择题When did you decide to be a teacher? Let me see.I am thirt
择题When did you decide to be a teacher? Let me see.I am thirty,and I have wanted to be one since_
a twenty years b twenty years ago c I had twenty years d I was twenty
答案为什么是d
since+一段时间+ago为什么不可以？
a twenty years b twenty years ago c I had twenty years d I was twenty
答案为什么是d
since+一段时间+ago为什么不可以？
赞 haifeng0193 幼苗
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d I was twenty 从宏观上来看就是一个时间点,而连词since的后面就要求加时间点,故正确.
1年前 追问
1
since不可以+一段时间
给个例句如何？
没错。这个 two years ago是指发生动作lived的第一天，从宏观上来说，它是实质仍然是一个时间点了。
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