| 1 |
can, must, have to, should and ought to are modal verbs. |
| 2 |
we use can and be able to to talk about ability or possibility: people can get their best ideas when they're doing nothing. |
| 3 |
we use be supposed to to say a person is expected to do something: in the UK people are supposed to have a break every four hours. |
| 4 |
we use be allowed to and can to say we have permission to do something: some French employees are allowed to begin their weekend at 3 p.m. on Thursday. in some American companies, employees can sleep whenever they want. |
| 5 |
we use must and have to to say sth is necessary: Rob says he must take more time off work. Lot of people have to take work home. |
| 6 |
we use should and ought to to give advice: people should only work 35 hours a week. We ought to spend more time relaxing. |
| 7 |
we can use have to and have got to to say that sth is necessary: I have to work tonight = I've got to work tonight. Have got to is very common in spoken English. |
| 8 |
we use infinitive after can, must, have to, should, ought to, be able to, be supposed to and be allowed to. |
| 9 |
can, must, should and ought to are the same for all subjects. |
| 10 |
I can go. I can't go. can I go? |
| 11 |
I must go. I mustn't go. must I go? |
| 12 |
he should go. he shouldn't go. should he go? |
| 13 |
we ought to go. we ought not to go. ought we to go? |
| 14 |
we make negatives and questions of have to by using the auxiliaries do and does: I don't have to go. Does she have to go? |
| 15 |
we make negatives and questions of be able to, be supposed to, be allowed to by changing the form of the verb be: he isn't able to come. you aren't allowed to go. What are we supposed to do? |
| 16 |
we don't usually use ought to in its question form. We usually use do you think... instead: do you think I ought to call him? |
| 17 |
we use don't have to to say sth isn't necessary: you don't have to wear a suit to work, but you can if you want to. |
| 18 |
we use mustn't to say sth is not allowed: you mustn't send pesonal emails from the office. You can only send work emails. |
| 19 |
to say sth isn't necessary in the past, we use didn't have to: I didn't have to work yesterday. |
| 20 |
use present continuous 1 are happening at the moment of speaking: I'm blogging from a busy street food market. I'm sitting in one of Mexico City's busy parks. |
| 21 |
use present continuous 2 are temporary and happening around now, but maybe not at this exact moment: now I'm writing a book about street food. We're working in Mexico for a few days. |
| 22 |
use present continuous 3 are changing over a period of time: my blog is becoming more popular every year. More and more people are visiting Thailand on holiday these days. |
| 23 |
after have you tried... we use verb + ing: have you tried talking to him about it? |
| 24 |
we often use what should i do? or what do you think i should do? to ask for advice. |
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