{1}
1. He can’t / couldn’t open the window.
2. Students must translate without dictionaries.
3. May I use your book?
4. Could you give me the recipe for this cake?
5. I hardly ever see Jane, she might have moved to Africa.
6. Take an umbrella. It may rain.
7. You should stop smoking.
8. You may finish the article in any time.
9. Liz ought to keep to a diet. She is ill.
10. Lara can get a cake for her birthday.
11. You must not read in the dark.
12. My grandfather is retired, so he doesn’t have to go to work.
13. The fridge is full, so we needn’t go shopping.
14. Our employees must sign this agreement.
15. We ought to reserve a table in advance if we want to have dinner there.
16. I can’t believe it! You must be joking.
19. Sorry, I’m late. I needed to / had to wait for the plumber.
20. Don’t wait for me tonight. I might be late.
21. We’ve got a dishwasher, so you needn’t wash-up.
22. You look very pale, I think you … (need/should) stay at home.
23. Could you, please, pass me the mustard?
Объяснение:
В зависимости от контекста в двух предложениях могут быть 2 варианта ответа.
1. He can’t / couldn’t open the window.
can’t - Он не может открыть окно.
couldn’t - Он не мог открыть окно.
19. Sorry, I’m late. I needed to / had to wait for the plumber.
needed to - Мне нужно было подождать сантехника. (это было мне необходимо, иначе я бы остался без воды / затопило бы... - причина опоздания в необходимости)
had to - Мне нужно было / пришлось ждать сантехника. (потому что сантехник опаздывал и мне пришлось его дожидаться - причина в задержке сантехника)
{2}
1-(b) Jack has got a headache. He hasn’t been able to sleep well recently.
2-(b) I could sleep for hours when I was a little girl.
3-(c) Tom can play tennis well but he couldn’t play a game yesterday because he was ill.
4-(c) I didn’t want to be late for the meeting. We had to meet at 5 sharp.
5-(a) Where are my gloves? — I have to put them on because it’s cold today.
6-(a) You needn’t take an umbrella today. The Sun is shining.
7-(b) I’m sorry, you didn’t invite me to your birthday party. You should invite
