help的形容词形式怎么变?

help例句：

1、We try to help all students realize their full potential.

我们努力帮助所有的学生充分发挥他们的潜力。

2、In case you should need any help, here's my number.

万一你需要帮助的'话，这是我的电话号码。

3、Give me one good reason why I should help you.

我为什么要帮你？给我一个充分的理由。

4、You've been a great help, I must say.

依我看，你真是帮了个大忙啊。

5、It's a good job you were there to help.

幸亏你来帮忙。