Means at a certain moment.

Represents the morning, noon, evening, month, season or year of a day.

On: indicates the day/week.

Period: from to end

Used to indicate a period of time.

Six years: six years.

Two months: two months.

Forever. forever

Execute: Under ...

The house is on fire! His house is on fire! )

This road is under construction. The road is being repaired. )

Reason: Because Al thinks but. ?

Methods and means: pass, use, pass, etc.

Ride a bike: Ride a bike

Quantity: about (or so), exceeding

Orientation: in, in, in, before, after, above, in the middle, below, behind, between, near, above and below.

(PS: it may not be comprehensive, when I try my best! )