He often helps me study English.中的study为什么不是单三特有形式的studies?

He often helps me study English.中的study为什么不是单三特有形式的studies? He often helps me study English. .( 一般问句. 同义句) Jim often helps me to study English. ( ),he often helps me whit my study He often helps me study Englisn. He often helps me study English .[改为同义句】He often .me .Englis study的单三形式为什么不是studys study的三单形式为什么是studies,那不就成复数了吗? 用适当形式填空he often helps ____ ( l ) to study English .____ ( th Sam often helps me study English改为同义句 ____,he often helps me with my study study单三study的单三形式是什么?