by时间短语
英语中关于by+时间的介词短语,如何影响动词时态 1\By the sith century B.C.,they were no longer used. 2\By the end of Octorber,I had finished my project.//www.souquanme.com 两个都是by+时间的用法,为什么前一个不需要用过去完成时,而后一个需要?by the 6th century BC是从公元前六世纪开始就不用了,表示的是过去发生的事,用一般过去时就行了
by the end of October是从过去某一时间到十月底,我完成了项目,是过去的过去,用过去完成时
by the end of October是从过去某一时间到十月底,我完成了项目,是过去的过去,用过去完成时
by加时间点用什么时态
by加时间点用 过去完成时态或将来时态。
如
We had learned four lessons by the end last week.
到上周末为止，我们学了4课。
They will graduate from here by tHe end of June next year.
如
We had learned four lessons by the end last week.
到上周末为止，我们学了4课。
They will graduate from here by tHe end of June next year.
by the end off+过去时间点造句，（6句），谢谢
1、时间就像海绵里的搜趣网水，可以随你任意挤压，却不可无意义消耗。
2、时间就像一枚弹簧，可以弹压，却不可以超越极限。
2、时间就像一枚弹簧，可以弹压，却不可以超越极限。
by+不同时间点句子的时态变化
表示时间,指“最迟在……之前”“到……的时候已经”,此时要注意它所连用的时态.
1、如果没有明显强调具体的影响结果,而是说一般的情况要用一般时态
He was very tired by the evening. 他到晚上已jfJav经很累了.
2、表示在.之前,不迟于 时 类似于条件句
My mother will come back by 6:00
2、by加表示过去的时间就用过去完成时 如by the end of( last month. )
He has read about 40 pages of the book by now. 现在这本书他已读了大约40页.
3、by加表示将来的时间就用将来完成时
We will have finished the work by next month. 到下个月我们就会干完了这工作.
另外,表示时间时,它还可表示“在……期间”,通常连用的名词是 day, night, moonlight, daylight等,注意名词前通常不用冠词.
Cats sleep by day and hunt b//www.souquanme.comy night. 猫白天睡觉,夜里捉老鼠.
Do you like to swim by moonlight? 你喜欢在月光下游泳吗?
1、如果没有明显强调具体的影响结果,而是说一般的情况要用一般时态
He was very tired by the evening. 他到晚上已jfJav经很累了.
2、表示在.之前,不迟于 时 类似于条件句
My mother will come back by 6:00
2、by加表示过去的时间就用过去完成时 如by the end of( last month. )
He has read about 40 pages of the book by now. 现在这本书他已读了大约40页.
3、by加表示将来的时间就用将来完成时
We will have finished the work by next month. 到下个月我们就会干完了这工作.
另外,表示时间时,它还可表示“在……期间”,通常连用的名词是 day, night, moonlight, daylight等,注意名词前通常不用冠词.
Cats sleep by day and hunt b//www.souquanme.comy night. 猫白天睡觉,夜里捉老鼠.
Do you like to swim by moonlight? 你喜欢在月光下游泳吗?
“by”的5种用法，怎么造句？
1.用于被动语态的句子中,表示动作的执行者,意为“被;由”。
He was praised by the teacher.他受到了老师的表扬。
th//www.souquanme.come book was written by Lu Xun.这本书是鲁迅写
的。
2.表示方式、方法、手段等,后常接无冠词的名词或动名词,意为“通过;靠;用”。
Don't judge a person by
appearances. 勿以貌取人。
He made a living by teaching.他以教书为生。
3.表示时间,意为“到……时(为止”或“不迟于……”。
He ought to be here by now.他现在应该在这儿了。
By the
time he was ten, he had learnt about 1,000 English words.到十岁时,他已学了约一千个英语单词。
4.表示(增减)程度,尺寸数量等,意为“至……的程度”。
the bullet missed me by two
inches.那子弹以两英寸之差未击中我。
the rope needs to be longer by two feet.这绳子需要再长两英尺。
5.表示交通路线或工具,后接名词不用冠词,意为“乘;坐”。
go by bus / plane / train 乘汽车(飞机、火车)去
travel by land / sea / air 陆上(海上、空中)旅行
