问题描述：
I'm trying to repair the bell,' answered Bill.' I've been coming up here night after night for week
新概念第三册,第二课 I've been coming up here night after night for weeks now.
I have been coming up 用的是现在完成式吗?为什么不用,I have come up,
还有,不明白,for weeks now, 为什么这几个单词拼在一起
新概念第三册,第二课 I've been coming up here night after night for weeks now.
I have been coming up 用的是现在完成式吗?为什么不用,I have come up,
还有,不明白,for weeks now, 为什么这几个单词拼在一起
问题解答：
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