Module4Module4GrammarInfinitive1
不定式的用法2
不定式的时态与语态1
Tomasteraforeignlanguageisnecessaryforacollegestudent
Itisgoodmannerstohelppeopleintrouble
Yourjobistowashdishes
AllIdidwas(to)givehimsomeadvice
作表语当作表语的不定式解释主语中do的意义时,to可以省略
Shepromisedtogivehimachance
作宾语agree,demand,ask,decide,expect,hope,want,offer,plan,pretend,promise,afford,prepare,refuse,manage,fail,dare,fear,swear等动词后面均可直接跟不定式作宾语
少数介词后面可跟不定式作宾语1
Ithasnochoicebuttoliedownandsleep
Theydidn’topentheirmouthsexcepttocomplain
当句子中的主动词为do时,but,except后的动词不定式省去to;can’tbut,can’tchoosebut,can’thelpbut,donothingbut,ratherthan,hadbetter之后省略to
Hedoesnothingbutplayallday
Atthenewsshedidn’tsayanythingbuttocry
Hecan’tchoosebutdoit
There’snothingtodoexcept/butwaittillitstopsraining
作宾语补足语Theteachertoldhisstudentstopaymore