问题补充：
i have to do my homework tonight[改为否定句】
答案：
在have前面加don ,就行了!因为have to 表不得不!
======以下答案可供参考======
供参考答案1:
为你解答。I have to do my homework tonight. （改为否定句）
I don have to do my homework tonight.
今晚我不必写作业了。
供参考答案2:
I have not to do my homework tonight
供参考答案3:
i后加don 即可
供参考答案4:
i don have to do my homework tonight
