Ответ:

I was playing computer games all day yestarday.

Were your friends waiting for you all this time?
Jon and Kim were swimming in the see, while Sue was reading an e-book.

Peter was not working on his desktop computer then.

Why were your brother updating his profile before going to school?

Объяснение:

Единственное, что тебе тут понадобится, это вот такая табличка с "формулой".