help的形容词是什么怎么写

The receptionist was less than helpful.

那接待员一点忙都不帮。

The following information may be helpful to readers.

下列信息可能对读者有用。

The catalog includes helpful information on the different bike models available

目录中包括了在售的各种型号自行车的有用信息。

It's natural to feel helpless against such abuse.

对这种虐待感到无能为力是自然的。

He lay helpless on the floor.

他无助地躺在地板上。

The audience was helpless with laughter.

观众情不自禁地大笑。