2023年中考英语语法精讲:介词by的用法归纳
一、by表示时间和单位的用法
1、 by表示时间的用法
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。如:
He was very tired by the evening.
他到晚上已经很累了。
He has read about 40 pages of the book by now.
现在这本书他已读了大约40页。
We will have finished the work by next month.
到下个月我们就会干完了这工作。
By the time the doctor arrived the patient had died.
在医生到达时,病人已经死了。
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。如:
Cats sleep by day and hunt by night.
猫白天睡觉,夜里捉老鼠。
Do you like to swim by moonlight?