when since before造句?

when since before造句?
since before when until 这四个单词,选用合适的将下面的三个句子联成一句--放在一个句子里
1.I wanted to ask her what was wrong
2.I hadn't time to do so.
3.She began to sob.
另外想问关于since ,这个到底是在……之前,还是自从……开始?
如since:
It's ten year since I began to play the piano.这句since是什么意思呢?是有10年了,还是说在10年前开始
sun198610 1年前 已收到1个回答 举报

rickeylv 幼苗

共回答了14个问题采纳率:85.7% 举报

I hadn't time to ask her what was wrong before she began to sob.
自从……开始!

1年前

1
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