verb tenses

[maoyueh]

Are the following sentences all gramatically correct? Thank you so much.

1. It rained all night.
2. It was raining all night.
3. It had rained all night.
4. It had been raining all night.

[waflob]

All look good to me - I just wonder how you knew what the weather was like here

[5jj]

They are all grammatically acceptable, but they will be used in different contexts.