The structure as…as… is used to say that people or things are equal in some way.

Should and ought have very similar meanings. In fact, they can often replace each other.

We should work hard, shouldn’t we? OR We ought to work hard, shouldn’t we?

Both some and any are used to refer to an indefinite quantity or number. They are used when it is not easy or necessary to say exactly how much/many we are thinking of.

Aren’t I?

The question tag for I am is aren’t I, not amn’t I.

I am late, aren’t I? (NOT I am late, amn’t I?)

Imperative sentences

To think about something is to have an opinion about something. When think is used to talk about opinions, we do not normally use progressive verb forms.
What do you think of his latest film? (NOT What are you thinking of his latest film?)
Who do you think did this? (NOT Who are you thinking did this?)

We do not normally use prepositions in some common expressions.

After certain verbs
The verbs enter, discuss, marry, lack, approach and resemble are usually followed by direct objects without prepositions.

The noun time is countable in expressions like a long time, a short time and quite a time.

They took a long time to finish the job.
We have been hearing about this for quite a time.