1.以下动词后,只能跟不定式作宾语.如:agree,ask,aim,arrange,choose,decide,demand,expect,fail,help,hope,lean,long,manage,offer,plan,prepare,pretend,promise,refuse,wish等,这些词大部分可接that引导的从句.如:

　　Idecidedtoaskformymoneyback.

　　IdecidedthatIwouldaskformymoneyback.

　　Whenourvisittothefarmwasover,weexpectedtostartbackonfoot.

　　Whenourvisittothefarmwasover,weexpectedthatwewouldstartbackonfoot.

　　②当复合宾语中的宾语是不定式时,先用形式宾语it代替不定式,把不定式置于补语之后,即:主语+动词+it+补语+todo句式.如:

　　Wethinkitquiteimportantforustolearnaforeignlanguagewell.

　　Hefeelsithisdutytohelpthepoor.

　　③介词but,except,besides+todo(do)

　　在这种句型中,如介词前有动词do,后面应接不带to的不定式;如无do,则接to不定式,即带do不带to,带to不带do.如:

　　Theenemysoldiershadnochoicebuttogivein.

　　OnSundayafternoonIhadnothingtodobutwatchTV.

　　2.部分动词后面,既可接动词不定式,也可接动名词作宾语,意义不变.如:begin,continue,start,hate,like,love,need,require,want等.

　　在need,require,want后接-ing形式,表示被动意义,也可接不定式,但要用被动形式,如:Yourhandwritingneedsimproving(tobeimproved).hate,love,like接不定式表示特定的未来事件,接动名词表示目前正在进行的活动或一般的行为.

　　在下列情况下,一般要用不定式:

　　①hate,like,love前有would(should)时,如:I'dliketohaveacupofcoffee.

　　②当谓语动词begin,continue,start等是进行式时,如:Thestudentsarestartingtoworkonthedifficultmathsproblem.

　　③begin,continue,start与know,understand等状态动词连用时,如:Isoonbegantounderstandwhat

　　washappening.