to是什麼詞性|from

from to是介詞詞性

例句

1、

She has to work at weekends from time to time.

她偶爾週末還得工作。

2、

The number of new students decreased from 210 to 160 this year.

今年新生人數從210減少到160。

3、

The transition from school to work can be difficult.  

從在學校唸書到上班工作，這一轉變有時候可真不容易。