To be
1. I am 20 years old.
2. Is she a student?
3. He is a doctor.
4. We are champions.
5. They are not children

Do/does
1. Do you speak French?
2. Did you go to school last Friday?
3. Does she like to dance?
4. Do we go to the park?
5. Did you get there at 5 o’clock?

Can/ could
1. I can run.
2. You could speak German when you were 7 years old.
3. She can drive a car.
4. We can play tennis.
5. She could knit when she was a little girl.

Much/ many
1. How much time did you spend there?
2. There are many pens in the table.
3. I have not much time to do this.
4. We have got many friends.
5. He hasn’t much money to buy this car.