
Originally Posted by
e2e4
"Had better do something = It's time someone did something." This is a strong advice and not it's time someone did something. "
I'd say you are both right.
Ex: I'd better go to the dentist before my tooth gets worse.
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Present and past subjunctive
The terms
present subjunctive and
past subjunctive can be misleading, as they describe
forms rather than
meanings: the past and present subjunctives are so called because they resemble the past and present indicatives, respectively, but the difference between them is a difference in modality, not a temporal one.
Subjunctive mood - Wikipedia, the free encyclopedia ______________________
Ex: It's high time (that) the children were in bed. 
Ex: It's about time (that) the children were in bed.