3)感官动词see,watch,lookat,notice,observe,hear,listento,smell,feel,find等后作宾补,省略to。
Thebossmadethemworkthewholenight.
=Theyweremadetoworkthewholenight.
6)help可带to,也可不带to,helpsb(to)dosth:
7)but和except:but前是动词do时,后面出现的动词用不带to的动词不定式。
8)由and,or和than连接的两个不定式,第二个to可以省去:
9)通常在discover,imagine,suppose,think,understand等词后,可以省去tobe:
Heissupposed(tobe)nice.他应该是个好人。
举例:
HewantstomovetoFranceandmarrythegirl.
Hewantstodonothingbutgoout.
比较:Hewantstodonothingbutgoout.
Hewantstobelieveanythingbuttotakethemedicine.
1)----Iusuallygotherebytrain.
----Whynot___byboatforachange?
A.totrygoingB.tryingtogoC.totryandgoD.trygoing
答案:D.whynot后面接不带to的不定式,因此选D。
2)Pauldoesn‘thavetobemade___.Healwaysworkshard.
A.learnB.tolearnC.learnedD.learning
答案:B.make后接不带to的动词不定式,当其用于被动时,to不可省略。