I don't want to go.

我不想去。

I don't want to brush my teeth.

我不想刷牙。

I don't want to do it because it's boring.

那个太无趣了，我不想做。

I don't feel like eating.

我没心情吃饭。

Why should I bother to do that?

我为什么要费心去做那件事？

Why do I have to brush my teeth?

我为什么一定要刷牙呢？

Don't ask me to do this and that.

不要叫我做这做那的。

Can I not do my homework?

我可以不做作业吗？

Can you do it for me,Mom?

妈，你能帮我做吗？

Can't you let Jack do it instead of me?

你不能让Jack代替我去做吗？