是but,except前有實(shí)義動(dòng)詞“do”時(shí),后可跟不帶to的不定式.如無“do”,則要帶.即有do無to,無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.另外這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寧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.