[alexlearner]

I am not sure which verb forms I can use for the preposition, for. I would like to make up some similar examples with it.

(1) I have been scoring a lot of goals for six weeks.

(2) I had been scoring a lot of goals for six weeks.

(3) I have scored a lot of goals for six weeks.

(4) I scored a lot of goals for six weeks.

(5) I was scoring a lot goals for six weeks.

I am not sure if the preposition, for, can only be used for certain tenses. Please explain this. Thank you very much.

[LunarJetman]

All of those examples are correct. For is used to describe a period of time, 6 seconds, 6 weeks, several months, the whole summer, etc.

This is in cotrast to the preposition since which is used to describe a point in time, for example, 6 months ago, last week, when I was a child.