. , , , , , , , , , . , .
to.
to have, to be ought, to be able, to be allowed, to, need dare, to, .
s (es). to have to (3 . .. has to). , to be: to be, to be able, to be allowed.
to do.
. not. :
have to V dont have to V; has to V doesnt have to V;
had to V didnt have to V.
to be, to be able, to be allowed not .
, , , .
Present Simple | Past Simple | Future Simple | ||
Must | Must V | Had to V | Must V Will have to V | , , |
To have to | Have to V Has to V | Had to V | Will have to V | |
To be obliged to | Am, is, are obliged to V | Was, were obliged to V | Will be obliged to V | |
To be to | Am, is, are to V | Was, were to V | , , | |
Ought to | Ought to V | |||
Can | Can V | Could V Was, were able to V | Will be able to V | |
To be able to | Am, is, are able to V | Was, were able to V | Will be able to V | |
May | May V | Might V Was, were allowed to V | Will be allowed to V | , , |
To be allowed to | Am, is, are allowed to V | Was, were allowed to V | Will be allowed to V | , , |
Should | Should V | , |