from是prep.从,从...起的意思。（表示时间）从…;（表示原因）因为;（表示来源）来自…;（表示分离）与…分离或隔开。

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from有哪些用法

1.从...起,始于 eg:She is singing from morning to night.她从早唱到晚.

2.从;由

eg:He rose from office boy to managing director in fifteen years.

他十五年里从办公室勤杂员升到总经理.

3.离(开) eg:Our school is two miles from the station.我们学校离车站两英里.

4.从...来;出自 eg:He comes from Shanghai.他来自上海.

5.(表示去除、免掉、阻止、剥夺等) eg:The pill will relieve you from pain.这药丸将使你免受痛苦.

6.(表示区别、比较) eg:He is old enough to know right from wrong.他已长大,能够辨别是非了.

7.(表示原料)由 eg:Flour is made from wheat.面粉由小麦制成.

8.因为,由于;出于

eg:He wasn't ill; he stayed in bed from laziness.他没病,躺在床上是因懒惰之故.

eg:He is trembling from fear.他吓得发抖.

8.across from.在...的对面

eg.The post office is just across from the club .邮局就在那俱乐部对面.