a. That shelf is too high. I can’t reach it.
b. What’s that noise? I can hear something.
c. There’s something wrong with this door. I can’t open it.
d. I’m really hungry! I haven’t been able to take my lunch break yet.
e. Sorry, I can’t come tomorrow. I’ll try and see you next week.
f. I really want to be able to use a computer properly.
g. Don’t push Harry in the water. He can’t swim.
h. I feel terrible. I haven’t been able to sleep for the past couple of night.
Правило: модальный глагол can имеет только две формы – простого настоящего/Present Simple (can) и простого времени. В остальных случаях – например, простого будущего/Future Simple (как в предложении f) или совершенного настоящего/Present Perfect (как в предложениях d и h), а также в других употребляют выражение to be able to.
Complete the sentence with may or can:
We can not imagine him without his motorbike.
How many instruments can you play?
Nick is strong. He can lift this box.
You can read this book: you know the language well enough.
His doctor says that he may eat any kind of food.
Do you think you can do that?
You may take my vocabulary till Friday.
Не can not go out because he is ill.
Complete the sentence with can or should:
How can you work in this noise? You should tell the children to stop.
You are in a hospital. You should be quiet.
Complete the sentence with may or must:
May I take your book? – I am afraid not: I need it.
Complete the sentence with must or can:
At what time must you come to school?
In many countries all children must attend elementary school.
Complete the sentence with can, may or must:
Can you cut something without a knife?
Must we do the exercise at once? – Yes, you must do it at once.
