as, because, for, since

1. She moved to London last May and has since got a job on a newspaper.
   她去年五月到倫敦，此後一直在報(bào)社工作。
2. It was the first time I'd won since I'd learnt to play chess.
   自從我學(xué)會(huì)下國(guó)際象棋以來(lái)，這是我第一次贏。
3. How long is it since we visited your mother?
   自從我們看望你母親以來(lái)到現(xiàn)在有多長(zhǎng)時(shí)間了？
4. We've been friends ever since we met at school.
   自從我們?cè)趯W(xué)校認(rèn)識(shí)之后，我們就一直是好朋友。
5. Since you can't answer the question, perhaps we'd better ask someone else.
   既然你無(wú)法回答這個(gè)問(wèn)題，我們最好再問(wèn)問(wèn)別人。