Past simple and past perfect simple

Yesterday I raised money for a charity.

Yesterday I didn't raise money for a charity.

Did you raise money for a charity yesterday?

He went shopping two weeks ago.

He didn't go shopping two weeks ago.

Did he go shopping two weeks ago?

At 8 pm Monica had already arrived.

At 8 pm Monica still hadn't arrived.

Had Monica arrived at 8 pm?

Yesterday she had already done all her homework.

Yesterday she still hadn't done all her homework.

Had she already done all her homework yesterday?

I had cleaned the car before I went to the party.

He ate some ice cream after he had finished lunch.

By the time he was five, he had already read many books.

Until I went to Italy, I hadn't eaten real Italian food.

Ian had finished his homework when I arrived.

I had already seen Jim when he said hello to us.

Already, yet, still, never, ever, just, for, since, etc.

When Monica arrived at the station, the train had already left.

He bought the car because he had seen an advert for it.