discourage的动词形式是什么

discourage的动词形式是discourage。

例句

1.

The theory is that smoking should be stripped of any appeal to discourage new generations from starting in the first place.

该理论认为削弱吸烟的吸引力，从而劝阻下一代开始抽烟。

2.

Don't be discouraged by the first failure ─ try again!

不要因第一次失败就灰心丧气——再试一次吧！

3.

Learners can feel very discouraged if an exercise is too difficult.

如果练习太难，学习者就可能感到很没信心。