Wednesday, 12 September 2012

PERMISSION AND OBLIGATION


                                                                                  WE USE
CAN + INFINITIVE
 
BE ALLOWED TO + INFINITIVE
 
 
 
 
TO TALK ABOUT THINGS THAT ARE
PERMITTED  IN THE PRESENT
 
WE USE
 
CAN’T + INFINITIVE
 
NOT BE ALLOWED TO + INFINITIVE
 
 
 
 
TO TALK ABOUT THINGS THAT ARE NOT PERMITTED  IN THE PRESENT
 
WE USE
 
HAVE TO
                             + INFINITIVE
HAS TO
 
 
 
TO TALK ABOUT THINGS THAT ARE NECESSARY TO DO
 
WE USE
 

DON’T
                             HAVE TO + INFINITIVE  
DOESN’T
 
 
 
TO TALK ABOUT THINGS THAT ARE NOT NECESSARY TO DO
                                                                                  WE USE
 
COULD + INFINITIVE
 
 WAS / WERE ALLOWED TO + INFINITIVE
 
 
 
 
TO TALK ABOUT THINGS THAT ARE
PERMITTED  IN THE PAST
 
WE USE
 
COULDN’T + INFINITIVE
 
WASN’T / WEREN’T  ALLOWED TO + INFINITIVE
 
 
 
TO TALK ABOUT THINGS THAT ARE
NOT PERMITTED  IN THE PAST
 
WE USE
 
HAD TO + INFINITIVE
                        
 
 
TO TALK ABOUT THINGS THAT ARE NECESSARY TO DO IN THE PAST
 
WE USE
 
DIDN’T HAVE TO + INFINITIVE
 
 
 
TO TALK ABOUT THINGS THAT ARE NOT NECESSARY TO DO IN THE PAST

 

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