by the time主从句时态
题目
by the time主从句时态
请分情况说明
答案
这个词组常用来指到某一点时间为止,主句常用完成时态.具体如下:
1)从句用一般现在时,主句用将来完成时(will have done).
Bythe time I graduate next year,I will have lived here for 5 years.到明年毕业时,我就在这里呆了五年了.
2)从句用一般过去时,主句用过去完成时.
e.g.Bythe time he was 12,he had traveled to more than 30 countries to get his diseases cured.到12岁为止,他已去过三十多个国家治病.
举一反三
我想写一篇关于奥巴马的演讲的文章,写哪一篇好呢?为什么好
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