Having a car is useless if you can not driver为啥要Having a car is useless if you can not driver为啥要用having
问题描述：
Having a car is useless if you can not driver为啥要
Having a car is useless if you can not driver为啥要用having
答
句首又没有主语
答
动词作主语要用ing形式，这是定理
答
因为Having a car 这部分是主语,动词只有改为“动名词”或者不定式（To do sth)才可以做主语
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