到底是help sb do sth 还是help sb to do sth?

到底是help sb do sth 还是help sb to do sth?

help sb to do sth和help sb do sth 是一样的，意思也一样，可能互换。

没有help sb doing sth这样的短语，但有can't help doing .

Can't help doing 情不自禁做某事，忍不住做某事。如He couldn't help jumping when he heard the good news.(当他听到这个好消息时，他忍不住跳了起来）。

can't help do sth=can't help to do sth 不能帮助做某事。如：I was too busy. I couldn't help do housework.(我太忙，不能帮助做家务事）

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