(Sometimes) That helps. （有时）那挺有帮助的。

　　I just wasted my time. That didn't help! 我白白浪费了时间，根本没什么帮助！

　　It might help. Just go and try it. 有可能会起到作用。去试试吧。

　　Leave me alone. You're not helping. 别管我，你不会帮到什么。

　　Did you buy your wife some flowers? 你给你老婆买花了没？

　　That didn't help. She's still mad at me.  根本没用，她还在生我的气。