from用作介詞，用來表示做為起點的特定地點或時間，有從...起，從...來，免掉，因為等含義?？捎脕碇付▉碓础⑵鹨?、方法或用具。

1.從...起，始于

She is singing from morning to night.她從早唱到晚。

2.從;由

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

他十五年里從辦公室勤雜員升到總經(jīng)理。

3.用來表示做為起點的特定地點或時間，

walked home from the station

從家走到車站

4.從...來;出自

He comes from Shanghai.他來自上海。

5.表示去除、免掉、阻止、剝奪等

The pill will relieve you from pain.這藥丸將使你免受痛苦。

6.表示區(qū)別、比較

He is old enough to know right from wrong.他已長大,能夠辨別是非了。

7.由于：用來指定來源、起因、方法或用具：

a note from the teacher

老師寫的條

taking a book from the shelf.

從架子上拿本書