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题目
His friends often help him learn chess.和 His friends often help him to learn chess.哪个对?
加to和 不加to有什么区别?是加to对还是不加to对?

提问时间:2020-07-24

答案
help sb.do sth.= help sb.(to) do sth.
to 可省略.通常都是使用 help sb.do sth.
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