can, may must , , , , , , .
.
.
We can use this sprinkler. () .
I can read. .
May , , , (, ).
May I come in? ?
may come at 6. , 6.
Must , , . . .
You must do it. .
.
can, may : , must .
Present Indefinite Tense Past Indefinite Tense
Can could
May might
must
. , , , , . :
to be able (to) , (
- )
to have (to) ( )
to be (to) ( ,
) must, - , ,
, , ? ? to. .
To write to be written to be writing to have written to have been written
.
:
( )
To study economics is very important
:
Our aim is to fulfill work in time.
You have to improve your methods of work.
:
We hope to get new data in a week or two.
:
The idea to use this new substance did not leave us. ( , , )
, ,
:
(In order to) make a discovery a scientist carries out a lot of tests. ( + inf, +gerund)
|
|
|
, :
, .
:
| . | + . | |
| We | Expect | Them to do work in time |
| , |
() . , , , . , , . , . .
: to know, to expect, to want, to consider, to think, to suppose, to find, to believe, :
I want you to know. , .
, , (to feel, to see, to hear, to watch) to :
We saw them enter the laboratory.
:
| ( ) | ( ) | |
| He | is known | to go to the seaside next week |
(to go) , (he) , , , (Is known) ( , )
.
He is said to have gone to the seaside.
:
(to report, to say, to know, to suppose, to expect, to consider, to believe, to think, to find)
They are expected to come back in two days. ,
to seem (-), to happen () to appear (-), to prove (), to be likely (), to be unlikely ( ), to be sure, to be certain )
They are unlikely to come in time.
The work proved to be useful.
(Conditional Sentences)
:
1. 1. . , , .
2. Present Indefinite, - Future Indefinite. :
If he has enough time he will complete his experiment.
, .
II. 3. . , , .
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|
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4. Past Indefinite, , should ( 1- ) would ( ) Indefinite Infinitive ( to).
to be were .
, . . :
If he had enough time he would complete his experiment. ,
III. 5. . , , .
6. Past Perfect, should, would Perfect Infinitive ( to).
:
If he had had enough time yesterday he would have completed his experiment. , .
. if . had, were, could, might, should :
Were 1 a scientist, I should carry out a lot of interesting researches.
