Modal verbs

Методическая система

1.Основные элементы методической системы.

Методическая система преподавателя состоит

1. Used without the particle to

 You must _help them.

 Anna can _sing professionally.

Don’t take -s; -ing or –ed, etc.

3. Modal verbs don’t need auxiliary verbs.
 Can I help you?

 Can I open the window?

Abbreviated negative forms: can't‘ mustn't, might, won't and etc.

Can.

We use can+ infinitive:
 We can see the lake from our hotel.

Declarative sentences (affirmative):
 They can ride a bike. (subject + can+ notional verb+ various secondary elements)

Declarative sentences (nеgative):
 They can’t ride a bike. (subject + can+ NOT+ notional verb+ various secondary elements)

Interrogative sentences:
 Can you speak any foreign languages?

Wh-questions (special questions):
 How can I help you? (Wh+ can+ subject+ notional verb+ various secondary elements)

The equivalent of the verb can is be able to.

 They are able to do the job faster than anyone else.

Can is used only in the present and past tense.

To be able to is more often used to express an action in the future, , but only in certain cases:

 I am free today so I am able to cook a dinner for us.

 Andrew was not able to take part in the race because his car was damaged.

 My husband earned enough this year so we will be able to go to the sea this summer.

COULD shows us that subject was able to do something in the past:

 He could play the violin when he was twelve.

We use could especially with verbs of perception and thinking:

 We had a lovely room in the hotel. We could see the lake.
 As soon as l walked into the room, I could smell gas.
 Could you hear that?

When we are talking about a specific situation or when nothing a specific achievement, we use was/were able to or managed to. Their meanings are very close.

 The fire spread through the building very quickly, but fortunately everybody was able to escape/ managed to escape. ( not could escape)
 We didn’t know where David was, but we managed to find/ were able to find him in the end. (not could find).