by the time的用法时态

文/张哲

by the time+过去时间,主句过去完成。by the time+将来时间,主句将来完成时等。还有一种情况就是不强调已经完成,只强调某一时期的具体情况,相当于when。

by the time的用法时态

by the time的用法时态是什么

by the time的用法时态是:by the time+过去时间,主句过去完成。by the time+将来时间,主句将来完成时。到……为止

如果从句中的谓语动词是一般过去时,那么主句中的谓语动词通常用过去完成时,表示“截止到从句动作发生时,主句动作已经完成,即过去的过去”。

He had left by the time we reached home.

当我们到家的时候他已经走了。

如果从句中的谓语动词为一般现在时/或现在完成时(表示将来),那么主句中的谓语动词常为将来完成时,表示“截止到将来某一时间为止,主句动作将已经完成”。

by the time的双语例句有哪些

1、By the time Alexandra was seven years old, she had begun painting with oil paints.

Alexandra七岁的时候,就开始用油画颜料画画了。

2、By the time I sit down and facetheblank page I am raring to go.

等到我坐下来面对一张白纸,我已经迫不及待地想要动笔了。

3、By the time oftheApollo program,thequality and variety of food increased even further.

到“阿波罗”计划时,食物质量和花样都进一步提高和增多。

4、By the time Lizette reachedthelichen meadow,thesun was up andtherocks were warm.

当莉莎特来到草场的时候,太阳已经升起来了,岩石都是温暖的。

5、By the time Cadieux tookthecase,thepolice had long since openedthemissing persons case.

到卡接手的时候,警局已经在这失踪案件上磨蹭很久了。