test eleven
不定式不带to的问题
1）在情态成语之后，即在would rather/would sooner/would（just） as soon（宁愿），may/might as well（不妨），cannot but/cannot help but之后。例如：
you can't help but respect them.
since it's a fine day we might as well walk.
2）在“使役动词 宾语”之后，即在let, have, make之后。例如：
let there be an end of this misunderstanding.
he won't have us criticize his work.
abby made him stay to tea.
3）在“感觉动词 宾语”之后，即在see, hear, observe, notice, feel, watch之后。例如：
we feel the house shake.
i didn't hear you say that.
4）在介词except/but之后
如果except/but之前有动词do的某种形式，其后通常用不带to的不定式，否则带to.例如：
they did nothing except work.
there's no choice but to wait.