have no choice but to do 书上讲的是but前的动词为实义动词时,其后一般接带to的动词不定式.

是but,except前有实义动词“do”时,后可跟不带to的不定式.如无“do”,则要带.即有do无to,无do有to. 例子：The animy can do nothing but/except surrender(投降). The animy had nothing to choose but/except to surrender. 另外这里有些特殊的固定搭配：1.had better/best （not）do sth 最好（不)做某事 2.would/had rather（sooner）do sth+than sth；would/had soon do sth+as do sth宁愿做某事而不愿做某事 3.cannot but/cannot choose but/cannot help but+do不得不做某事 4.do nothing (not do anything)but/except+do sth只能做某事.

1 can do nothing but go
2 can't but go
3 have no choice but to do ------带to
4 have no alternative but to go-------带to
5 have to go-----带to
6 can't help but go
6 there is nothing to do but go
(请比较和记住以上动词结构，对你的学业有用)