SHOULD AND HAD BETTER

SHOULD AND HAD BETTER

KEY : Should is formed from the present form of /shall/. Should is the past form. But we can not use it to express something happen in the past time or the same way as simpel past tense.
Should is used to express advice that we give to someone. In other words, should is to give advice or suggestion.

For examples:
you should see the doctor.
you should stay at home.
you should know how to work properly.

From the examples above we can see the structure. should must be combined with bare-infinitive.

Should In Verbal Sentence : Place Bare-infinitive after should

For examples:
(+) you should take a rest.

(-) you shouldn't take a rest.

(?) Should I take a rest?

Should in Nominal Sentence : Place /be/ after should

For examples:
(+) you should be on time.
(-) you shouldn't be late.

(?) Should I be on time?