Question

前有do后无to的句型有哪些

Answer 1

前有do后无to的用法。具体参考如下：
（1）连词连接两不定式前面的有do后面的to do的to省略，如：
I have nothing to do but watch TV all day long.
Tom have no choice but to give it up.
（2）用is连接，不定式作表语时前面主语有do时后面表语to do的to省略，如：
What I want to do is stay at home.
What I want is to stay with you.
（3）注意这里说的前有do后无to的前面的do要是实意动词do,不能是助动词do

Answer 2

1.What I want to do is make a shopping list.

2. I have nothing to do but wait.

Answer 3

LZ您求助错啦！XD是小学生！