Module 4 4) My Grandpa
(could / mustn't) speak several languages
5) People
(mustn't/ are not able to) eat unhealthy food.
6) He was weak and everybody
(had to / was able to) pity him.
7) (Can / Could)
you hear a strange noise out there?
8) We
(could / had to feel our skin itch.
9) The children
(are able to / mustn't) talk with their mouth full.
10) She is a perfect doctor. She
(was able to / had to) cure me of bad
breath.
4 Complete the sentences using can or (be) able to. Use the proper tense
forms.
1) Mary has travelled a lot and she
speak several languages.
2) We haven't
sleep well that night.
3) Sonia
drive but she hasn't got a car.
4) She used
do scuba diving when young.
5) He
work quickly if he wants.
6)
understand Susan. I've never
to understand her.
7) Be careful with the medicine. It
be poisonous
8) Cheetah
run at a high speed.
9) She
take up the job. She does not have any experience.
visit you tomorrow if you want.
10) 1​

4) My Grandpa could speak several languages.
- "Could" is used to talk about an ability or skill in the past. It indicates that in the past, my grandpa had the ability to speak several languages.

5) People mustn't eat unhealthy food.
- "Mustn't" is used to talk about something that is prohibited or not allowed. It indicates that people are not allowed to eat unhealthy food.

6) He was weak and everybody had to pity him.
- "Had to" is used to talk about necessity or obligation. It indicates that everybody felt obligated to pity him because he was weak.

7) Can you hear a strange noise out there?
- "Can" is used to talk about ability or possibility. It indicates if the person has the ability to hear the strange noise.

8) We could feel our skin itch.
- "could" is used to talk about ability or possibility. It indicates that we had the ability to feel our skin itch.

9) The children are able to talk with their mouth full.
- "are able to" is used to talk about ability. It indicates that the children have the ability to talk with their mouth full.

10) She is a perfect doctor. She was able to cure me of bad breath.
- "was able to" is used to talk about an ability or accomplishment in the past. It indicates that she had the ability to cure me of bad breath.

Complete the sentences using can or (be) able to. Use the proper tense forms.

1) Mary has traveled a lot and she can speak several languages.
- "Can" is used to talk about present ability. It indicates that Mary has the ability to speak several languages based on her past travels.

2) We haven't been able to sleep well that night.
- "(be) able to" is used to talk about the ability or possibility of doing something. It indicates that we haven't had the ability to sleep well that night.

3) Sonia can drive but she hasn't got a car.
- "can" is used to talk about present ability. It indicates that Sonia has the ability to drive, but she doesn't have a car at the moment.

4) She used to be able to do scuba diving when young.
- "used to be able to" is used to talk about ability in the past. It indicates that she had the ability to do scuba diving when she was young.

5) He can work quickly if he wants.
- "can" is used to talk about present ability. It indicates that he has the ability to work quickly if he chooses to.

6) I can't understand Susan. I've never been able to understand her.
- "can't" and "been able to" are used to talk about present and past ability respectively. It indicates that I currently don't have the ability to understand Susan, and I have never had the ability to understand her in the past.

7) Be careful with the medicine. It can be poisonous.
- "can" is used to talk about possibility or likelihood. It indicates that the medicine has the potential to be poisonous.

8) Cheetahs can run at a high speed.
- "can" is used to talk about present ability. It indicates that cheetahs have the ability to run at a high speed.

9) She can't take up the job. She does not have any experience.
- "can't" is used to talk about present ability or possibility. It indicates that she doesn't have the ability or possibility to take up the job because she lacks experience.

10) I will be able to visit you tomorrow if you want.
- "will be able to" is used to talk about future ability or possibility. It indicates that I will have the ability or possibility to visit you tomorrow if you want.