helpful动词形式: helpHe is always very helpful to his mother .他一向都是他母亲的得力帮手。

This new dictionary is very helpful to me .对我来说这本新词典很顶事。Our old gentleman is helpful and sound .我们这位老先生很合作，很明智。You will find both of them most helpful .你会发现他们两人都是挺有用的。You might find a great many helpfulsuggestions .你会得到许多有益的启迪。