from作爲介詞的意思:
1. 從...起,始於
例句:She is singing from morning to night.
她從早唱到晚。
2. 從;由
例句:He rose from office boy to managing director in fifteen years.
他十五年裏從辦公室勤雜員升到總經理。
3. 離(開)
例句:Our school is two miles from the station.
我們學校離車站兩英里。
4. 從...來;出自
例句:He comes from Shanghai.
他來自上海。
5. 表示去除、免掉、阻止、剝奪等
例句:The pill will relieve you from pain.
這藥丸將使你免受痛苦。
6. 表示區別、比較
例句:He is old enough to know right from wrong.
他已長大,能夠辨別是非了。
7. 表示原料由
例句:Flour is made from wheat.
麪粉由小麥製成。
8. 因爲,由於;出於
例句:He wasn't ill; he stayed in bed from laziness.
他沒病,躺在牀上是因懶惰之故。
9. 起點城市
乘飛機旅行常用詞彙之機票篇 ...起點城市 from
10. 從,來自,以來
11. 從…來;離開
例詞:across from
12.在...的對面
例句:The post office is just across from the club .
郵局就在那俱樂部對面。