Do / Does / Did for Emphasis

When we want to emphasis a statement we can use do, does, and did with stress to add meaning.

For negative sentences, extra stress is added to don't, doesn't and didn't to emphasis.

Point 1: In present simple sentences, you can use 'do' to show emphasis.

Do you have a car?

1. I do have a car.
2. I don’t have a car.

Do they serve bagels?

1. They do serve bagels.
2. They don’t serve bagels.

Point 2: If the subject is third person singular, then you use 'does' to show emphasis.

Does he work here?

1. He does work here.
2. He doesn’t work here.

Does it cost a lot to live there?

1. It does cost a lot.
2. It doesn’t cost a lot.

Point 3: If the action happens in the simple past tense, use 'did' to show emphasis.

Did he come to work today?

1. He did come to work today.
2. He didn’t come to work today.

Did they find an apartment?

1. They did find an apartment.
2. They didn’t find one.

Point 4: We can add 'do/does/did' and 'though' to a sentence to show contrast between two actions

1. I hate math. I do like science though.
2. He does not have much money. He does have a nice house though.
3. I got sick on vacation. We did have a good time though.