1. I have been in
London. Я был в Лондоне. 2. I haven`t been in London. Я не был в Лондоне. 3. Have you ever been in London? Ты когда-нибудь был в Лондоне?
1. I had written
the essay by the end of last week. 2. I hadn`t written the essay by the end of
last week. 3. Had you written the essay by the end of last week?