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BE hElpFul to Do

第一种说法正确。参考helpful的用法。 be helpful to / in doing sth 对.......有用 1 to: This will be helpful to you when you are grown up. 当你长大时,这将对你有用。 2 in doing sth She was very helpful in preparing my manuscript. ...

sth. is helpful to sb. ……对某人有助 ....is helpful to sth. 对……有助 、 我觉得这里是运用 ,.... is helpful to sth. 不过就是用动名词形式strengthening the sense of reponsiblity and managing interpersonal relations 来充当sth.而已,...

还有be helpful (for sb) to do 这个词组be helpful in doing sth 也有

heipful两个用法 be heipful for sb to do sth 和题目用法一样, 对某人来说做某事是有帮助的,有益的,for sb, 或者to do sth 并不是一定要同时出现 be helpful to sth ,对东西用to,有帮助的,有益的

be useful to do sth it is helpful to do sth. 做……是有好处的 It is helpful for sb. to do sth. 某人做……是对他有好处的 这两个都是it 做形式主语 helpful 是表示“有好处”,而不是“有助的” it is helpful in doing sth. sth. is helpful to s...

to do 等待某人做某事 没有doing的说法

what can we do to be a helpful person? 我们能做什么做一个有用的人?

ACDBB

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