例句：
The booklet should be very helpful to parents of disabled children.
這本小冊子對于殘疾兒童的父母會很有用。
Role-play is helpful in developing communication skills.
角色扮演有助于提高溝通技巧。
Sorry I can't be more helpful.
對不起，我幫不上更多的'忙。
You'll find her very helpful ─ if she's not too busy, that is.
你會覺得她很肯幫忙，那是說如果她不太忙的話。
She was very helpful when my mother was ill ─ I'll allow you that.
我母親生病時她幫了很大的忙——我同意你說的這一點。