Study the rules. Сomplete the sentences with can, can't, could or couldn't
Study the rules

Usage of can

• We use can say that something is possible or permitted, or that somebody has the ability to do something. We use can + infinitive (can do / can see etc.):

  You can see the river from our windows.

  "I forgot my ruler." "You can take mine."

  Can you speak English?

  I can visit you tomorrow.

• The negative form of "сan" is can't / cannot:

  I'm can't swim.

Usage of could in the past

• Could is the past form of can. We use could especially with these words:

  see, hear, smell, taste, feel, remember, understand

  We could see the river.

  I could smell cologne.

  I couldn't hear your words.

• We also use could say that somebody had the ability or permission to do something:

  My grandmother could speak foreign languages.

  We finished our work. We could do something interesting.

1. When Daisy was 3, she [ ] read.
2. She doesn't know any notes. She [ ] play the piano.
3. When my grandmother was younger, she [ ] run so fast.
4. I [ ] drive a car when I was 10.
5. Every ballerina [ ] jump very high.
6. Cats [ ] fly, but they [ ] swim.