Question

but 前面有 do 的某种形式时, but 后面的动词不定式要省略 to,为什么会有道题是这样的

When she heard the news ,she said nothing but _____ into tears.
A. burst B. to burst C. bursting D. burst
我认为应该选B，可答案给的是A,为什么？

Answer 1

这道题不是有do省to的句型。she said nothing but burst into tears是这样的She said nothing,but she burst into tears.主语重复，故省略一个主语。but只是一个连词

追问

请问这道题您以前遇到过吗，还有就是can`t choose but do 是固定搭配吗

追答

遇到过，can`t choose but do可以看做固定搭配

Answer 2

有do无to,无do带to。
例如：He did nothing but lie down and sleep.
He had no choice but to lie down and sleep.
选B
do nothing but do 语法书上说一定要省略to。
老师祝你学习进步！
望采纳，多谢！^_^