Could and couldn't.

Positive auxiliary

• could

• couldn't

Negative auxiliary

• could

• couldn't

Positive auxiliary

Negative auxiliary

The negative form of could is

• don't

• couldn't

Could and couldn't are used to express:

• likes and dislikes in the past

• abilities and disabilities in the past

I____________ speak when I was a baby

• could

• couldn't

Grandparents ______________ move faster when they were kids

• couldn't

• could

Where could we go in vacations?

• We could go to the public pool.

• We can go to the public pool.

Raymond ____________ buy a ticket for the concert because he doesn't have money.

• could

• couldn't