Question

Заполните пропуски, используя can или to be able to в соответствующем времени. Иногда возможны оба варианта. 1. Tom … drive but he hasn’t got a car. 2. I was tired and I … fall asleep at once. 3. If the weather is fine tomorrow we … go to the country. 4. He … (not) go to the theatre next Sunday. 5. John is good at Maths and … do any sums. 6. As Lilly helped us we … finish the work in time. 7. Ask Ann about your problem. She … help you. 8. I can’t understand Martin. I’ve never … understand him. 9. He … (not) come to the last meeting as he was ill. 10. Tom … play the guitar well. 11. If you come to us next summer I … show you our town. 12. Mary has never … dress properly. 13. In an hour I’ll be free and … join you. 14. It rained last night and we … (not) go out. 15. Last summer Robert … play football rather well but he … (not) play football during the coming season as he has hurt his leg.

Answer 1

1)can (те вообще-то Том может водить, но у него нет тачки)
2)could (тк существует возможность события в прошлом -те Я так устал, что cмог уснуть сразу)
3)will be able to (существует определенная возможность на будущее)
4)can (здесь модальный глагол can относится к будущему)
5)can (просто Present Simple Tense)
6)were able to (больше подходит по смыслу, тк говорится о разовом действии в прошлом)
7)can /will be able to (допустимы оба, но второй вариант звучит очень формально и даже странно)
8)been able to (смысловая нагрузка, те НЕ ИМЕЛ возможности понять)
9)couldn't /was not able to (оба варианта, тк в прошедшем в отрицательной форме как для постоянных, так и для разовых событий)
10)can
11) will be able to (см №3)
12)could (вообще и 2й вариант тоже подойдет, тк существует отрицание из-за never, но это меняет смысл, те could всмысле не могла/не умела,а was able to - не имела возможности)
13) can/ will be able to (оба варианта, тк существует договоренность на будущее)
14) can not/ weren't be able to (отрицательная форма как и 12, но смысл не меняется)
15) 1- could/ was able to (оба варианта подойдут) 2-won't be able to (возможность на будущее- в данном случае отсутствие её)
Вроде, верно. Удачи!

Answer 2

1. Tom can drive but he hasn’t got a car.
2. I was tired and I was able to fall asleep at once.
3. If the weather is fine tomorrow, we will be able to go to the country.
4. He won't be able to go to the theatre next Sunday.
5. John is good at Maths and can do any sums.
6. As Lilly helped us, we were able to finish the work in time.
7. Ask Ann about your problem. She can help you.
8. I can’t understand Martin. I’ve never been able to understand him.
9. He didn't come to the last meeting as he was ill.
10. Tom can play the guitar well.
11. If you come to us next summer, I will be able to show you our town.
12. Mary has never been able to dress properly.
13. In an hour, I’ll be free and will be able to join you.
14. It rained last night and we couldn't go out.
15. Last summer Robert could play football rather well, but he won't be able to play football during the coming season as he has hurt his leg.