What is different between I asked him and I had asked him Could anyone explain clearly with example

Could you explain verb get and take What is different between Get and take ?

Had I been offered Is this passive voice ? could you explain with another example

We gave him 5 bucks We gave him 5 bucks

I sent him at airport I sent him at airport .is this sentence correct

We have been playing We have been playing .And we have played. What is the difference between both sentences could enyone explain it .

They have been running because because they are tired now. Is this sentence is correct? But we can say they have run . What is different between they have run and they have been running

I have made him understand. This sentence correct.

Please readit My mother has been preparing food.