Have to/ don’t have to; can/can’t

We can also use 'have to' to express a strong obligation. When we use 'have to' this usually means that some external circumstance makes the obligation necessary.
I have to arrive at work at 9 sharp. My boss is very strict.
We have to give him our answer today.
You have to pass your exams or the university will not accept you.
You have to score goals to win.
You don’t have to be a great swimmer.

We use 'can' to talk about 'possibility'.
Can you do that?
I can't manage to do that.
You can leave your car in that parking space.
You cannot smoke in here.

Notice that there are two negative forms: 'can't' and 'cannot'. These mean exactly the same thing. When we are speaking, we usually say 'can't'.

We use 'can' to talk about 'ability'.
I can speak French.
I can't drive.
You can’t touch the puck with your hands.
You can wear a gardening glove.

Последнее изменение: Tuesday, 6 December 2011, 16:44