英语词汇from的用法
from是介词它与其他介词有着相似的用法，但它的词义有很多不同的语境表达不一样的意思，下面yjbys小编总结了介词from的用法欢迎参考
from的用法
1. 注意不要因汉语习惯的影响，误用 from：
自1990年以来他直住在这里。
正：He has lived here since 1990.
误：He has lived here from 1990.
太阳从东方升起，从西方落下。
正：The sun rises in the east and sets in the west.
误：The sun rises from in the east and sets from the west.
展览会将从星期三开始。
正：The exhibition will begin on Monday.
误：The exhibition will begin from Monday.
2. 其后可接副词或介词短语。如：
It’s a short distance from here. 从这儿去不远。
The cat jumped out from under the bed. 猫从床底下跳出来。
He chose three from among these books. 他从这些书当中选了3本。
正因为可接介词短语作宾语，所以下面这句中的 from where 就不难理解了。如：
He hid himself in a tree, from where he could seethe ememy in the distance. 他躲在一棵树上，从那儿他可以看到远处的敌人 。
3. 从今天起多久以后 ，用“一段时间+from today ” 。如：
Threeweeks from today is a holiday. 从今天起放三周假。
I’ll comeback a month from today. 我下个月的今天回来。
4. 关于 from…to…：
用于时间、地点、变化、数目等。如：
I worked there from Mayto August. 我从5月至8月在那儿工作。
They flew from Paris toRome. 他们坐飞机从巴黎到罗马。
There’re from sixty to eightypeople present. 出席的有60至80人。
Things went rapidly frombad to worse. 情况很快变得越来越糟。
用于时间时，可用 from…till, until, through。如：
We workfrom Monday to [till, until, through] Friday. 我们从星期一工作到星期五。
但是若没有 from 则不能用 to。如：
I stayed there till [until, through, up to] September. 一直到九月我都住在那儿。
用于下列习语 。如：
from side to side 从一边到另一边，左右
from house to house 挨家挨户
from handto hand 从一人之手到他人之手
from door to door挨家挨户
fromtime to time 不时地
from west to east 从西向东
from shop toshop 逐店
from day to day 一天天地
from head to foot从头至脚，全身
from beginning to end 从头至尾
from hand to mouth赚一点吃一点，仅能糊口
from morning to night 从早到晚
rom where定语从句
用法一：
用于引导非限制性定语从句，在意义上相当于 and from there（从那儿）。如：
He hid himself in a tree, from where he could see the enemy in the distance. 他躲在一棵树上，从那儿他可以看到远处的`敌人。
We went up to the roof, from where we had a good view of the procession. 我们爬上屋顶，从那儿可以很好地观看。
用法二：
可视为where前省略了the place，即这样用的from where 相当于from the place where，意思是“从……的地方”“离……的地方”。如：
From where I stood I could see everything clearly. 从我站的地方我一切都看得清清楚楚。
The car stopped short only a few inches from where I stood. 汽车在离我站的地方仅几英寸处突然停住。
The school was only a few blocks from where she lived. 学校离她的住所只有几个街区的距离。
若遇到前面是地点名词的先行词，如何判断用 where 还是 from where 还是 from which? 请看下面一个句子：
I have bought that house, _____I can enjoy the beautiful scene of Yangpu Bridge .
我们认为这道题填 where 和 from where 语法上都可以（但不宜填 from which），但两者在意义上稍有区别：
I have bought that house, where I can enjoy the beautiful scene of Yangpu Bridge. 我买下了那栋房子，在房子那可以欣赏到杨浦大桥的美景。
I have bought that house, from where I can enjoy the beautiful scene of Yangpu Bridge. 我买下了那栋房子，从房子那可以欣赏到杨浦大桥的美景。
在许多情况下，用不用 from 不会导致语法错误，但会导致语义变化（通常情况下是，如果没有 from，意思会不够明确和清楚）。比较：
He hid himself under the bed, from where he could hear what they were talking. 他躲在床下面，他可以从床下听到他们谈话。（句中的 from where 可理解为 from under the bed，意思是“从床下面”）
He hid himself under the bed, where he could hear what they were talking. 他躲在床下面，在床那儿他听到他们谈话。（句中的 where 可指为“在床边”“在床上”“在床下”等，意思不够明确）
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