What grades is this for?

Second through fifth, where sentence combining is a standard writing expectation.

Do I need an account?

No, all ten items play free in the browser.

My student only uses 'and'. Where do I start?

With but. Contrast is the most semantically distinct of the four and the easiest to make obvious — a pair where the second sentence is unexpected given the first will not accept and comfortably.

Compound Sentence Building

What's in this activity

I like pizza. I like pasta. → I like pizza and pasta.

She ran fast. She won the race. → She ran fast, so she won the race.

It was cold. We stayed inside. → It was cold, so we stayed inside.

I wanted juice. There was none left. → I wanted juice, but there was none left.

The dog barked. The cat ran away. → The dog barked, and the cat ran away.

He was tired. He kept working. → He was tired, but he kept working.

We can walk. We can take the bus. → We can walk, or we can take the bus.

She studied hard. She passed the test. → She studied hard, so she passed the test.

It rained all night. The game was cancelled. → It rained all night, so the game was cancelled.

I called him. He didn't answer. → I called him, but he didn't answer.

About this activity

Ten pairs of short sentences shown with their combined form: I like pizza and pasta; She ran fast, so she won the race; I wanted juice, but there was none left; We can walk, or we can take the bus. The four conjunctions do genuinely different jobs — addition, consequence, contrast and alternative — and choosing between them is a reasoning task disguised as a grammar one.

How to use it in a session

Cover the combined version and let the student build it themselves before revealing it. The reveal is a check, not the lesson. When the student reaches for and by default, ask whether the second sentence happened because of the first — that question usually produces so without you having to name it. It was cold, we stayed inside is the clearest example to start with because the causality is obvious.

What to listen for

Listen for and doing all four jobs. A student who says he was tired and he kept working has combined the sentences and lost the contrast that but carries, and the meaning is measurably different. Watch for run-on sentences where the conjunction is present and the comma is not — in speech that is invisible, and it becomes a marking issue in writing.

Carrying it home

Sentence combining works well aloud. Say two short sentences and ask the child to make them one, then let them give you a pair. Two minutes and no materials.

Questions

What grades is this for?: Second through fifth, where sentence combining is a standard writing expectation.
Do I need an account?: No, all ten items play free in the browser.
My student only uses 'and'. Where do I start?: With but. Contrast is the most semantically distinct of the four and the easiest to make obvious — a pair where the second sentence is unexpected given the first will not accept and comfortably.