by the time主句用一般现在时,从句用什么时态 主句用一般过去,从句用什么时态
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解决时间 2021-02-20 10:51
- 提问者网友:火车头
- 2021-02-19 20:09
by the time主句用一般现在时,从句用什么时态 主句用一般过去,从句用什么时态
最佳答案
- 五星知识达人网友:長槍戰八方
- 2021-02-19 21:19
有关by the time 的时态:
1.后接表示现在的时间,用现在完成时。 如 By the time of this term, we have learned 5000 words.
2.后接表示将来的时间,用一般将来时或将来完成时。 如 By the time 2012, we will learn 5000 words. (一般将来时) 或By the year 2012, we will have learned 5000 words. (将来完成时)
3.后接表示过去的时间,用过去完成时。如 I hadn’t found a job by the time my classmates all found their jobs.
1.后接表示现在的时间,用现在完成时。 如 By the time of this term, we have learned 5000 words.
2.后接表示将来的时间,用一般将来时或将来完成时。 如 By the time 2012, we will learn 5000 words. (一般将来时) 或By the year 2012, we will have learned 5000 words. (将来完成时)
3.后接表示过去的时间,用过去完成时。如 I hadn’t found a job by the time my classmates all found their jobs.
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- 1楼网友:话散在刀尖上
- 2021-02-19 21:41
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。
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