be helpful后面跟什么

be helpful后面跟什么？

1.The following information may be helpful to readers.下列信息可能对读者有用。

2.A predominantly liquid diet for a day or two may be helpful.一两天里主要吃流质食物可能会有好处。

3.Talking things out with someone else can be helpful.跟别人讨论讨论把问题彻底谈开了可能会有用。