ⅠⅠ .作主语.作主语1) 不定式作主语, 谓语动词常用单数
2 )不定式(短语)作主语时, 为避免句子头重脚轻,常用 it 作形式主语置于句首,而将不定式(短语)放在句尾
1 . When and where to build the new factory ____ yet . (MET’91)A . is not decided B. are not decided C.has not decided D. have not decided2 . Is ____ necessary to complete the design before National Day(MET’89)A﹖. this B. that C . itD. heⅡ .作宾语1 )及物动词 ask, agree, beg, care, choose, decide, expect, force, fail, hope, learn, long, manage, offer, pretend, plan, prepare, promise, refuse, want, help, wish 等后接不定式作宾语
2 )要注意 can’t help, try, remembercan’t help, try, remember ,, forgeforget, mean, regret, stopt, mean, regret, stop 等动词后接不定式与接v-ing 的区别
3 . She can’t help __ the house because she’s busy making a cake . ( 上海’ 99)A
to cleanB
cleaningC
cleaned D
being cleaned4 . He agreed