初三英语上册必备语法：介词by的用法.ppt

成都孟母教育培训学校初中英语知识点系列课件之,介词By的用法,1表示位置：“在.旁边”，“靠近.”。表示此意时，常可与beside 换用。如：Some are drawing by/beside the lake 一些人在湖边画画。,2表示时间：“到.为止”，“不迟于”。常与过去完成时连用，当by 引导的是未来的时间状语时，可用一般将来时。如：Your son will be all right by supper time 你儿子晚饭时会就没事了。,3.表示用交通工具、通讯工具，后接名词单数，不加冠词。如：He came by train,but his friend came by bus.他是乘火车来的，可是他的朋友是坐公共汽车来的。,4.与反身代词oneself 连用，表示独自、单独或没有人帮助（全凭本人）。如：I cant leave her by herself 我不能让她一个人呆着。,5用于被动结构中，意为“由、被”。如：The pupils were given some advice by the teacher 老师给学生们提了一些建议。,6用于某些固定短语中。如：by the way 顺便，顺便问一下 by and by 不久以后 little by little 逐渐地 by hand 用手one by one一个接着一个,【练习】用含有by 的短语完成下列各题：,1Come and sit _（我旁边）2_（到上星期日）I had finished the book 3She came home _（乘飞机）4Did you make the desk _（自己独自）?,by me,By last Sunday,by plane,by yourself,5_（顺便问一下）,how many people are there in your family?6It has been turned into water_（受热）7The Great Wall was built_（用手）,By the way,by the heat,by hand,