高中英语情态动词have to,should,ought to
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THE MODAL VERBS
HAVE TO, DON´ T HAVE TO-SHOULD,OUGHT
HAVE TO REFERS ABOUT OBLIGATION OR SOMETHING THAT IT´ S NECESSARY TO DO.
She has to clean the floor
OUGHT TO
This verb is used in the same way as Should. It expresses a weak obligation.
Karen ought to be more careful
We ought to go together
USED FOR GENERAL SITUATIONS SPECIFIC AS WELL AS
You have a headache. You should take an aspirin.
You should always consult a doctor before t百度文库king antibiotics
I have to feed my dog
HE SAYS I HAVE TO DO MORE EXERCISE (HE SAYS IT IS NECESSARY FOR ME TO EXERCISE MORE)
SHOULD IS USED TO GIVE ADVICE OR EXPRESS SOMETHING THAT IS A GOOD IDEA. CAN BE
HAVE TO, DON´ T HAVE TO-SHOULD,OUGHT
HAVE TO REFERS ABOUT OBLIGATION OR SOMETHING THAT IT´ S NECESSARY TO DO.
She has to clean the floor
OUGHT TO
This verb is used in the same way as Should. It expresses a weak obligation.
Karen ought to be more careful
We ought to go together
USED FOR GENERAL SITUATIONS SPECIFIC AS WELL AS
You have a headache. You should take an aspirin.
You should always consult a doctor before t百度文库king antibiotics
I have to feed my dog
HE SAYS I HAVE TO DO MORE EXERCISE (HE SAYS IT IS NECESSARY FOR ME TO EXERCISE MORE)
SHOULD IS USED TO GIVE ADVICE OR EXPRESS SOMETHING THAT IS A GOOD IDEA. CAN BE