By the end of和at the end of的区别,如果选择题让都时间,应该选哪个?

来源：学生作业帮编辑：拍题作业网作业帮分类：英语作业时间：2024/05/01 14:53:18

答：两者of后都可以跟表示时间的名词.可以是过去的时间名词,也可以是将来的时间名词如last year 和next year
前者主句用完成时态（过去完成时和将来完成时）,后者用于一般时态（一般过去时和一般将来时）.
例如：We had learned 2000 English words by the end of last year.
We will have learned 3000 English words by the end of next year.
We went to Hongkong at the end of last year.
We will go to New York at the end of next year.

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