For each sentence, choose the best option.
1. You don’t have to/ mustn’t tell anyone – it’s a secret!
2. I must / have to stay late at school today = we’ve got a rehearsal for the play.
3. Since the accident he hasn’t been able to / couldn’t speak.
4. In your country must men/ do men have to do military service?
5. I ought to / mustn’t send her an email – she must be very worried.
6. I can’t/ couldn’t swim when I was younger.
7. I must / have to go to the dentist’s – I’ve got really bad toothache.
8. Don’t worry about losing your library card – you can/should get a new one.

Ex 2

Complete the sentences with the correct verbs. Use the clues in brackets.

1. Hey girls, …….. (request) you make us some sandwiches?
2. Even men …….. (ability) put some cheese between two bits of bread.
3. No Lisa, you …….. (prohibition) listen to them. Dave! You ……(advice) be so lazy!
4. Remember when you ……. (ability) understand why your printer wasn’t working and I …… (necessity) fix it for you?
5. Men …… (duty) help women with technical problems.
6. You love …….. (possibility) to show how much you know about computers.
7. I …….(ability) eat this rubbish!

1. You don’t have to tell anyone – it’s a secret!
- In this sentence, the correct option is "don't have to." This means that it is not necessary for the person to tell anyone about the secret. There is no obligation or requirement to share the information.

2. I have to stay late at school today = we’ve got a rehearsal for the play.
- The correct option in this sentence is "have to." It indicates an obligation or requirement for the person to stay late at school because there is a rehearsal for the play. It is necessary for them to be present.

3. Since the accident, he hasn’t been able to speak.
- The correct option here is "hasn't been able to." It indicates that after the accident, the person has faced a difficulty or inability to speak. This is a result of the accident and they are not able to do it currently.

4. In your country, do men have to do military service?
- The correct option is "do men have to." It is asking if there is a requirement or obligation for men to do military service in the person's country. This implies that it is mandatory for men to serve in the military.

5. I mustn't send her an email – she must be very worried.
- The correct option in this sentence is "mustn't." It means that the person should refrain from sending an email because the recipient is likely to be very worried. It suggests that sending an email might worsen the recipient's emotional state.

6. I couldn't swim when I was younger.
- The correct option in this sentence is "couldn't." It indicates that in the past, the person was not able to swim. It shows a lack of ability or skill at that specific time in the past.

7. I have to go to the dentist’s – I’ve got really bad toothache.
- The correct option here is "have to." It indicates an obligation or necessity for the person to go to the dentist because they have a severe toothache. It suggests that it is necessary for their well-being.

8. Don't worry about losing your library card – you can get a new one.
- The correct option in this sentence is "can." It means that the person has the ability or possibility to get a new library card. It reassures them that there is no need to worry because they have the option to obtain a replacement.

Ex 2:

1. Hey girls, could you make us some sandwiches?
- The verb "request" is used to ask or politely demand something. In this sentence, the speaker is making a request to the girls to make sandwiches.

2. Even men are able to put some cheese between two bits of bread.
- The verb "ability" indicates that men have the skill or capability to put cheese between two pieces of bread. This sentence highlights the simple task that even men can do.

3. No Lisa, you must not listen to them. Dave! You should not be so lazy!
- The verb "prohibition" expresses the idea of not allowing or preventing something. In the first part of the sentence, it is expressed that Lisa is not allowed to listen to "them." In the second part, the verb "advice" suggests that Dave should not be lazy.

4. Remember when you were able to understand why your printer wasn't working, and I needed to fix it for you?
- The verb "ability" indicates that the person was able to understand why the printer wasn't working in the past. The verb "necessity" implies that the speaker had to fix it for them.

5. Men have a duty to help women with technical problems.
- The verb "duty" expresses the idea of something that someone is required or obligated to do. In this sentence, it states that men have an obligation or responsibility to assist women with technical problems.

6. You love the possibility to show how much you know about computers.
- The verb "possibility" refers to the potential or chance of something happening. In this sentence, it suggests that the person enjoys the opportunity to demonstrate their knowledge about computers.

7. I am able to eat this rubbish!
- The verb "ability" implies that the speaker has the ability or capability to eat the mentioned rubbish. It suggests that they are able to consume it without any problems.