I often spend as much time as I can to prepare my lessons中,为什么用 to prep

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IoftenspendasmuchtimeasIcantopreparemylessons中,为什么用toprepIoftenspendasmuchtimeasIcantopreparemylesso

I often spend as much time as I can to prepare my lessons中,为什么用 to prep
I often spend as much time as I can to prepare my lessons中,为什么用 to prep

I often spend as much time as I can to prepare my lessons中,为什么用 to prep
to prepare my lessons 是不定式短语,做目的状语.
I often spend as much time as I can 是一个整体“我时常花费尽可能多的时间”;
to prepare my lessons 去“准备我的功课”,表示目的.

这个to是与spend搭配的 后面接动词, 一般是用on后接名词或ING 不过用to接动词也是没有问题的

这是一个固定搭配,sb spend sometime to do sth,只需记住就行

I (often) spend (as much TIME as I can) to prepare (my lessons).
spend sth to do sth.