he couldn't earn enough to keep himself and his family .keep为什么不用动名词

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he couldn't earn enough to keep himself and his family .keep为什么不用动名词

he couldn't earn enough to keep himself and his family .keep为什么不用动名词
he couldn't earn enough to keep himself and his family .
keep为什么不用动名词

he couldn't earn enough to keep himself and his family .keep为什么不用动名词
to 是引导的目的状语
表示挣了钱去干嘛
to do 不定式做目的状语
不能用动名词keeping

这里的to是不定式的(表达目的)
后面接动词原形很正常

to keep是在后面做状语的,前面一个couldn't···enough to do一般是这么用的,如果你的英语语感不是很好的话,你学习英语还是要适当的记一下语法和一些固定搭配的!这样对你的英语是有帮助的。