when since before造句?
since before when until 這四個單詞,選用合適的將下面的三個句子聯(lián)成一句--放在一個句子里
1.I wanted to ask her what was wrong
2.I hadn't time to do so.
3.She began to sob.
另外想問關(guān)于since ,這個到底是在……之前,還是自從……開始?
如since：
It's ten year since I began to play the piano.這句since是什么意思呢？是有10年了，還是說在10年前開始