Should (Unit 34,35)

Should expresses what is right, or a good idea . It expresses advice, or a mild obligation. 

-|-	You should stop smoking.
<-|	You should have come. Why didn't you?
|->	You really should start eating better. I should be home at the usual time.

+	You should stop smoking.
?	Should we invite Sue to the party? Yes, I think we should .
-	Those children shouldn't be playing. They should be at school.

We also use should to say something is not right or not what we expect.
For the past, we use should have done.
Should to say that something will probably happen .

EXAMPLES:
I should be home at the usual time.

You can use should after these verbs: suggest, propose, recommend, insist, demand.

You can use should after these adjectives: important, strange, funny, natural, surprised, essential, odd, typical, interesting, suprising.