(八)非谓语动词一、动词不定式1.动词不定式的句法功能(1)不定式作主语ToknowsomethingaboutEnglishisonething;toknowEnglishisquiteanother
此时,常用it作形式主语,而把不定式放在句子的后部
Itisn’teasyforhertofindanewjob
(2)不定式作宾语①不定式可作某些动词的宾语,常见的动词有:afford,agree,ask,decide,desire,expect,fail,hope,manage,promise,pretend,plan,intend,refuse,wish等
Ipromisednottobelate
②介词but/except后接不定式作宾语时,如前面有实义动词do,不定式就要省略to
Ithasnochoicebuttoliedownandsleep
Theydidnothingbutcomplain
(3)不定式作宾语补足语①某些动词如tell,want,wish,advise,order,require,expect,remind,persuade,encourage,convince,force,beg,allow,forbid等后可接不定式作宾语补足语
Mydoctoradvisedmetotakearest
②某些感官动词如feel,hear,see,watch,notice,observe等或使役动词如have,let,make等后面可接不带to的不定式作宾语补足语
但如果句子变成被动语态时,就必须带to符号
Didyounoticeanyonegointothehouse
Wasanyonenoticedtogointothehouse
③某些动词如find,feel,think,expect,consider,make等后可接不定式作宾语,但宾语后要接