He needs to spend time on his homework.
题目
He needs to spend time on his homework.
其中的on可以改为in吗?
因为我知道有spend time (in) doing sth.既然in后面可以跟动名词,那好像就可以跟名词的吧?
答案
He needs to spend time on his homework.==He needs to spend time( in) doing his homework
举一反三
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