i spent two hours doing my homeword yesterday.请问换成这样表达为什么不对?i take two hours to do my homework.是不是take只能是这样的结构:it takes sb sometime to do sth.即take做花费时只能是it做形式主语是吗?那这一句为什么能单独用take:swimming acress the river takes about 10 minutes.

问题描述:

i spent two hours doing my homeword yesterday.请问换成这样表达为什么不对?
i take two hours to do my homework.是不是take只能是这样的结构:it takes sb sometime to do sth.即take做花费时只能是it做形式主语是吗?那这一句为什么能单独用take:swimming acress the river takes about 10 minutes.