1) Is it very useful like that?
那样会很有用吗？
2) Be it useful trying that way?
那样做有用吗？
3) That'd be very helpful.
那很有用。
4) This usually worked.
那样很管用。
5) There is no use in that.
那样没有用。
6) That is some help to us, ie It helps to a certain extent.
那对我们很有用.
补充资料：那样
1.代词。指示程度﹑方式﹑性状等。
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