Phrases, clauses, and writing with sentence variety
Telling a phrase apart from a clause, explaining what job each one does in a sentence, using them to build simple, compound, and complex sentences, and combining coordinate adjectives with commas
About three lessons of 40 to 50 minutes
The building blocks that turn short, choppy sentences into real writing
'The dog barked. It was loud. The dog was in the yard.' Three short, correct sentences that a reader would find tiring fast. A phrase or a clause, added and combined skillfully, turns those three sentences into one: 'The dog in the yard barked loudly.' Same information, much better writing.
This unit teaches the difference between a phrase (a group of words with no subject-and-verb pair) and a clause (a group of words that does have one), and how combining them deliberately gives you control over sentence length and rhythm instead of writing the same short sentence shape over and over.
- 'in the yard' (a phrase)adds detail, but has no subject-and-verb pair of its own
- 'because it heard a noise' (a clause)has its own subject and verb (it heard), but cannot stand alone as a sentence
- Short, short, short, short.reads choppy; combining sentences with phrases and clauses creates rhythm
- 'a bright, colorful, handmade kite'coordinate adjectives, separated by commas, each one modifying 'kite' independently
What students will be able to do
Students will explain the difference between a phrase and a clause and identify the function each performs in a specific sentence; will combine short, choppy sentences into varied simple, compound, and complex sentences using phrases and clauses; and will correctly punctuate coordinate adjectives with commas.
- I can tell a phrase apart from a clause by checking for a subject-and-verb pair.
- I can explain what job a specific phrase or clause is doing in a sentence (adding detail, joining ideas, and so on).
- I can combine short sentences into a longer, varied sentence using a phrase or a clause.
- I can use a comma to separate coordinate adjectives, and know when adjectives are not coordinate.
Standards this unit teaches
- L.7.1Common Core (US)Grammar and usage
Explain the function of phrases and clauses in general and their function in specific sentences, and use them to write varied and clear sentences.
- L.7.2Common Core (US)Commas with coordinate adjectives
Use a comma to separate coordinate adjectives (adjectives that could be reordered or joined with 'and' without changing the meaning) and spell grade level words correctly.
Prior knowledge
This unit builds on skills students should already have met. Revisit any that are shaky first.
- Pronoun case, vague references, and shifts (Grade 6)this unit builds on Grade 6's close attention to sentence-level editing, now applied to sentence structure
- Main or Subordinate Clause worksheetsextra practice telling a main clause apart from a subordinate one
- Text connectives worksheetswords like however and therefore that often begin a clause when linking ideas
- All grammar worksheetsmore sentence-combining and editing practice
Words to teach and display
- Phrase
- a group of words that works together but has no subject-and-verb pair, such as 'in the yard' or 'running quickly'
- Clause
- a group of words that does have a subject and a verb; a main clause can stand alone, a subordinate clause cannot
- Sentence variety
- using a mix of simple, compound, and complex sentences instead of repeating the same short sentence shape
- Coordinate adjectives
- two or more adjectives that each independently describe the same noun, and could be reordered or joined with 'and'
Teach it: model, guided practice, independent
The lesson moves from a teacher model identifying phrases and clauses in real sentences, to guided practice combining short sentences using them, to students revising a choppy paragraph into one with real sentence variety. Every example is a real, plausible sentence, so the grammar is practiced on usable text, not isolated rules.
1. Telling a phrase apart from a clause
Model the one test that decides everything: does this group of words have its own subject and its own verb? If yes, it is a clause; if no, it is a phrase.
Practice on short examples first: 'after the game' has no subject-verb pair, it is a phrase. 'after the game ended' has a subject ('the game') and a verb ('ended'), so it is a clause, specifically a subordinate one because it cannot stand alone.
Once students can sort phrases from clauses reliably, move to spotting them inside full sentences, where they are doing real work rather than sitting in isolation.
Identify the phrase and the clause in this sentence, and explain the job each one does: 'Running down the hill, Marco tripped because his shoelace was untied.'
- Find the phrase: 'Running down the hill' has no subject-verb pair of its own, it is a phrase describing what Marco was doing.
- Find the clause: 'because his shoelace was untied' has a subject ('his shoelace') and a verb ('was untied'), it is a subordinate clause explaining why he tripped.
- Note the job of each: the phrase adds action detail, the clause adds a cause-and-effect reason.
Answer: 'Running down the hill' is a phrase describing Marco's action; 'because his shoelace was untied' is a subordinate clause giving the reason he tripped. Together they add detail and cause without needing two separate sentences.
- What single test tells a phrase apart from a clause?
- Why can a subordinate clause not stand alone as its own sentence?
2. Combining short sentences for sentence variety
Model taking a set of short, choppy sentences and combining them into one varied sentence using a phrase or a clause, without losing any information.
Give students the combining question: which of these short sentences could become a phrase or clause tucked into another one, instead of standing alone?
Push for variety across a whole paragraph, not just one sentence: if every sentence in a paragraph is combined the exact same way, it is still repetitive, just at a longer length.
Combine these three short sentences using a phrase or a clause: 'The bus was late. Students waited at the stop. It was raining.'
- Pick the core sentence: 'Students waited at the stop.'
- Turn one short sentence into a clause: 'because the bus was late.'
- Turn another into a phrase: 'in the rain.'
Answer: Students waited at the stop in the rain because the bus was late. (One combined sentence, same three pieces of information, with real sentence variety instead of three short, choppy sentences.)
- How do you decide which short sentence becomes the main clause and which becomes the added phrase or clause?
- Why is repeating the exact same combining pattern in every sentence still a variety problem?
3. Commas with coordinate adjectives
Teach the two quick tests for coordinate adjectives: can you reorder them, and can you put 'and' between them without it sounding wrong? If yes to both, they need a comma.
Contrast with non-coordinate adjectives, which describe different aspects and cannot be reordered or joined with 'and': 'three old books' cannot become 'old three books' or 'three and old books', so no comma is used.
Should this sentence have a comma? 'She wore a bright colorful scarf.'
- Test reordering: 'a colorful bright scarf' still sounds fine, so this passes the reorder test.
- Test 'and': 'a bright and colorful scarf' also sounds fine, so this passes the 'and' test.
- Since both tests pass, the adjectives are coordinate and need a comma.
Answer: She wore a bright, colorful scarf. (Both adjectives independently describe the scarf and pass the reorder and 'and' tests, so a comma separates them.)
- What are the two tests for whether adjectives are coordinate?
- Why does 'three old books' not need a comma between 'three' and 'old'?
Common misconceptions and how to address them
MisconceptionAny group of words that adds detail to a sentence is a clause.
Why it happens: Students focus on what the words do (add detail) rather than checking for a subject-and-verb pair.
How to address it: Drill the one test every time: is there a subject and a verb inside this group of words? No subject-verb pair means it is a phrase, no matter how much detail it adds.
MisconceptionLonger sentences are automatically better writing than shorter ones.
Why it happens: Students hear 'combine your sentences' and start cramming every idea into one overly long sentence.
How to address it: Teach that variety, not length alone, is the goal; a mix of some longer, combined sentences and some short, punchy ones usually reads best.
MisconceptionEvery pair of adjectives before a noun needs a comma between them.
Why it happens: Students see two adjectives in a row and assume a comma is always required.
How to address it: Apply both the reorder test and the 'and' test every time, and practice examples where the comma is correctly left out because the adjectives are not coordinate.
Guided practice (with answers)
1. Is 'before the storm arrived' a phrase or a clause? Explain.
Answer: A clause, because it has a subject ('the storm') and a verb ('arrived'). It is a subordinate clause, since it cannot stand alone.
2. Combine: 'The cake was chocolate. It had three layers. Everyone loved it.'
Answer: One combining option: 'Everyone loved the three-layer chocolate cake.' Or, using a clause: 'The chocolate cake, which had three layers, was loved by everyone.'
3. Should this have a comma? 'He found a small wooden box in the attic.'
Answer: No comma: reordering ('wooden small box') sounds wrong, and 'small and wooden box' also sounds wrong, so the adjectives are not coordinate.
4. Should this have a comma? 'It was a long exhausting day.'
Answer: Yes, a comma: 'exhausting long day' and 'long and exhausting day' both sound fine, so the adjectives are coordinate. 'It was a long, exhausting day.'
Independent practice worksheets
Set the matching ChalkBee Grade 7 grammar worksheets for independent practice, having students identify phrases and clauses, combine a set of choppy sentences, and punctuate coordinate adjectives correctly.
Differentiation
- Give a checklist card with the subject-and-verb test written out, for students to apply every time they classify a group of words.
- Provide the short sentences to combine along with the target phrase or clause already written, so students only have to place it correctly.
- Practice the reorder and 'and' tests for coordinate adjectives out loud as a class before asking students to apply them independently.
- Start with two-sentence combines before moving to three or more.
- Take a paragraph of their own past writing and revise it for more sentence variety using phrases and clauses.
- Write one sentence that intentionally uses two phrases and one clause, then label each part.
- Find a sentence with non-coordinate adjectives in a class reading book and explain why no comma is used.
- Combine four or five short sentences into a single, clear sentence without making it confusing to read aloud.
Assessment: exit ticket
A four-question exit ticket sampling phrase-or-clause identification, sentence combining, and coordinate-adjective punctuation.
1. Is 'after school' a phrase or a clause? Explain.
Answer: A phrase, because it has no subject-and-verb pair of its own.
2. Combine: 'The lake was frozen. We walked across it carefully.'
Answer: One option: 'We walked carefully across the frozen lake.'
3. Should this have a comma? 'She adopted a tiny gray kitten.'
Answer: No comma: 'gray tiny kitten' and 'tiny and gray kitten' both sound slightly off, and 'tiny' describes size while 'gray' describes color, different aspects, so they are not coordinate.
4. Should this have a comma? 'It was a warm sunny morning.'
Answer: Yes, a comma: 'sunny warm morning' and 'warm and sunny morning' both sound fine, so the adjectives are coordinate. 'It was a warm, sunny morning.'
Teacher notes and timings
- Rough timing across three lessons: Lesson 1 phrase versus clause (section 1), Lesson 2 combining for sentence variety (section 2), Lesson 3 coordinate adjectives plus the exit ticket (section 3 and assessment).
- Language to keep saying: is there a subject and a verb, which short sentence becomes the main one, can I reorder these and join them with and. These phrases target the unit's three main misconceptions.
- Curriculum note: L.7.1 is taught here through sentence combining rather than abstract labeling drills, since the standard explicitly asks students to use phrases and clauses to write varied sentences, not just identify them; L.7.2's comma rule is included as the unit's related mechanics skill.
- Reuse student writing samples where possible; phrase-and-clause combining transfers best when students revise sentences they actually wrote, not only textbook examples.
- Present mode and print both work: use the Print button for a clean editing worksheet, or project the short-sentence sets to combine live as a class.