What is a cumulative adjective?

One that stacks on the words after it instead of describing the noun on its own. In the large square canvas, large describes a square canvas, so the two fail the swap test (a square large canvas) and take no comma.

Why does a phrase like school bus or pine tree never take a comma?

Because the first word is a noun doing an adjective's job, and it belongs to the noun. A crowded yellow school bus has no commas at all, since each word stacks on the ones after it.

Can one sentence need a comma in one place and none in another?

Yes, and every sentence on this sheet does. The painter used bold, confident strokes on the large square canvas. Bold and confident are coordinate. Large and square are cumulative.

8th grade commas between coordinate adjectives

8th grade commas between coordinate adjectives worksheets

At eighth grade every sentence has two strings of adjectives: one coordinate pair that takes a comma and one cumulative string that does not. In a steep, rocky trail past two old stone cabins, steep and rocky pass both tests, while two old stone must stay in that order. Eighth graders run the tests on both strings and write only the commas that belong.

Free printable PDF worksheet.

Each print is a different sheet with its own answer key. You don't need to sign up.

The kind of sentences you'll fix

Add the missing comma or commas to each sentence.

The letter described a harsh lonely winter in a tiny log cabin.
Fixed: The letter described a harsh, lonely winter in a tiny log cabin.
Soldiers built the fort from rough heavy logs and large river stones.
The ferry crossed the dark choppy water toward three tiny islands.

Every print pulls a new set of sentences at this level, so a make-up test or a second sibling gets a different mix.

What's on an 8th grade sheet

8th grade sheets draw from 53 sentences, 7 to a page. None of these sentences are on 7th grade sheets. 7th grade sheets print 8 to a page.

A few of the sentences, as the answer key corrects them:

The fans gave a loud, joyful cheer for the last home game of the season.
Our coach demands a calm, focused attitude before every big playoff match.
Hugo stirred the rich, fragrant soup in a heavy iron pot.

Fix it. Add the missing comma or commas to each sentence. 7 sentences to fix per page.

Every version prints on US Letter or A4, with its answer key on the last page.

How to teach this

Once students know the tests, the grade 8 habit is running them on every string in the sentence, including the ones past the first. The cumulative strings follow a fixed order that native speakers feel without naming: number, opinion, size, age, color, material, then a noun used as an adjective (two old stone cabins, a crowded yellow school bus). Words from different slots stack without commas. Words from the same slot, like two opinions or two qualities, are coordinate and take one. Naming the order once helps students explain a choice their ear already made.

Watch for: Never put a comma between the last adjective and the noun. A long, muddy, trail is wrong even when the first comma is right. Adjectives of number, material, and color usually attach to the noun as a unit, which is why two wooden benches and a bright red jacket take no comma. Both tests have to pass. If the pair fails either the and test or the swap test, leave the comma out.

Common questions about 8th grade commas between coordinate adjectives

What is a cumulative adjective?: One that stacks on the words after it instead of describing the noun on its own. In the large square canvas, large describes a square canvas, so the two fail the swap test (a square large canvas) and take no comma.
Why does a phrase like school bus or pine tree never take a comma?: Because the first word is a noun doing an adjective's job, and it belongs to the noun. A crowded yellow school bus has no commas at all, since each word stacks on the ones after it.
Can one sentence need a comma in one place and none in another?: Yes, and every sentence on this sheet does. The painter used bold, confident strokes on the large square canvas. Bold and confident are coordinate. Large and square are cumulative.

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Reviewed by the One more sheet team. Content version 241, updated September 2026.

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