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MODAL VERBS. UNIT 8. If we are certain about something . To talk about the present: “ MUST + Infinitive ” or “ CAN’T + Infinitive ” Example : He must be a doctor. He’s wearing a white coat. He can’t be a doctor. He isn’t wearing a white coat.
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MODAL VERBS UNIT 8
If we are certain about something • To talk about the present: “MUST + Infinitive” or “CAN’T + Infinitive” Example: He must be a doctor. He’s wearing a white coat. He can’t be a doctor. He isn’t wearing a white coat. • To talk about the past: “MUST+have+past participle” or “CAN’T+have+past participle” Example: It must have taken you a lot of effort to do this writing. It is very good. It can’t have taken you a lot of effort to do this writing, since it is full of mistakes.
If we are not certain about something (but we think it is possible) • To talk about the present: “MAY/MIGHT/COULD ” (perhaps) Example: The shops may/might/could be open today. The shops may not/might not be open today. • To talk about the past: “MAY/MIGHT/COULD+ Have + Past Participle” Example: I think I might have forgotten my book in the car. • To talk about the future: “MAY/MIGHT/COULD + Infinitive” Example: It might/may/could rain tomorrow.
To give advice • SHOULD Recommendations.Example: You should focus more on your family. When you go to Paris, you should visit the Eiffel Tower. • OUGHT TO Recommendations. The same as “should” but in a more formal way. Example: We all ought to use less electricity. • MIGHT Suggestions. Example: You might visit the botanical gardens during your visit. • MUST To give a strong advise to yourself or to others (based on your opinion). Example: You must try this cake, it’s wonderful.
OBLIGATION • MUST/MUSTN’T For stating rules. Strong external obligation. Example: You mustn’t smoke here. You must wear your seat-belt while driving. • HAVE TO/DON’T HAVE TO Obligation, but not from outside Example: Children have to go to school. // I don’t have to work on Sundays. • SHOULD/SHOULDN’T Mild obligation or advise. Example: You should save some money. You shouldn’t smoke so much.
EXERCISE I’m certain that’s not Sara’s motorbike That Sara’s motorbike. The dog is very dirty. It’s possible he swam in the sea The dog swum in the sea. That’s definitely the best restaurant in town That the best restaurant in town. I’m sure your brother ate all the chocolate Your brother all the chocolate. There’s no possibility that they cooked this properly They cooked it properly. I’m sure you’re feeling full after all that food You feeling full after all that food. I’m certain you didn’t see Maria out of shopping You Maria out of shopping. It’s possible the waiter didn’t write down your order The waiter written down your order.
CORRECTION I’m certain that’s not Sara’s motorbike That can’t be Sara’s motorbike. The dog is very dirty. It’s possible he swam in the sea The dog might have swum in the sea. That’s definitely the best restaurant in town That must be the best restaurant in town. I’m sure your brother ate all the chocolate Your brother must have eaten all the chocolate. There’s no possibility that they cooked this properly They can’t have cooked it properly. I’m sure you’re feeling full after all that food You must be feeling full after all that food. I’m certain you didn’t see Maria out of shopping You can’t have seen Maria out of shopping. It’s possible the waiter didn’t write down your order The waiter might not have written down your order.