to do不定式的结构变化
连词and的若干条用法说明
'1. 连接两个相同的比较级，表示“越来越……”。如：The car runsfaster and faster. 汽车开得越来越快。Our country is becomingmore and more beautiful. 我们...'
动词不定式的否定式
7.10 动词不定式的否定式 Tell him not to shut the window… She pretended not to see me when I passed by. 我走过的时候，她假装没看见。典型例题1）Tell him ___ the window. A. to shut not B. not to shut C. to not shut D. not sh…...
带to的情态动词
21.13 带to 的情态动词 带to 的情态动词有四个：ought to, have to, used to, be to, 如加上have got to ,(=must), be able to，为六个。它们的疑问，否定形式应予以注意： Do they have to pay their bill before the end of the month? She did…...
