情态动词，助动词后面接动词原形？？还有那些词后面接动词原形

不定式符号to后面加动词原形（It is time to do..）；情态动词can/ may/ must/ have to +动词原形，wii+动词原形，be going to+动词原形，助动词do、 does、don't， doesn't后面加动词原形，let sb do “让我们……”
make sb do “让我们……”
have sb do “让我们……”
Why not do “为什么不……；……吧”如：Why not ask her ?
Why don’t you do “为什么不……；……吧”

Will you please……? “请你……好吗？”
Would you please ……?

prefer to do rather than do “喜欢做……而不喜欢……”

would rather do sth “宁愿……”
rather than do sth “宁愿……”
would rather do than do“宁愿……而不……”

used to do sth “过去常常”

do nothing but do sth “只能”
don’t do anything but do “只能”

can’t ( help / choose ) but do 不能不 ；只得；必须
When your classmates need your help , you can’t but go .
When the streets are full of melting snow , you can’t help but get your shoes wet .

can not … too /over / enough / more “越…… 越……”
A man cannot have too many ties .
You can’t be over careful .
One can’n be too careful .

情态动词，助动词后面接动词原形没错！
但情态动词ought 后有个to ought to do sth

had better
would rather
do nothing but
help (to) do sth
Why...?
Why not...?

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