例句：
The booklet should be very helpful to parents of disabled children.
这本小册子对于残疾儿童的.父母会很有用。
Role-play is helpful in developing communication skills.
角色扮演有助于提高沟通技巧。
Sorry I can't be more helpful.
对不起，我帮不上更多的'忙。
You'll find her very helpful ─ if she's not too busy, that is.
你会觉得她很肯帮忙，那是说如果她不太忙的话。
She was very helpful when my mother was ill ─ I'll allow you that.
我母亲生病时她帮了很大的忙——我同意你说的这一点。