文档介绍：不定式形式  ohavebeendone进行式tobedoing完成进行式tohavebeendoing完成式:不定式的一般形式所表示的动作,通常与主要谓语表示的动作(状态)同时(或几乎同时)发生,,在谓语所表示的动作(状态)之前发生,(=IamgladIhaveseenyourmother).(比较:Iamgladtoseeyou.))动词+不定式  afford aim appear agree arrange ask be decide bother care e dare demand desire determine expect elect endeavor hope fail happen help hesitate learn long mean manage offer ought plan prepare pretend promise refuse seem tend wait wish undertake 举例:   Thedriverfailedtoseetheothercarintime. 司机没能及时看见另一辆车。Ihappentoknowtheanswertoyourquestion. 我碰巧知道你那道问题的答案。2)动词+不定式; 动词+宾语+不定式 ask,beg,choose,expect,hate,helpintendlike,love,needprefer,prepare,promise,want,wish…Iliketokeepeverythingtidy. 我喜欢每件东西都保持整洁。Ilikeyoutokeepeverythingtidy. 我喜欢你年使每件东西都保持整洁。3)动词+疑问词+to  decide,know,et,learn,remember,show,understand,see,wonder,hear,findout,explain,tellPleaseshowushowtodothat.  请演示给我们如何去做。Therearesomanykindsoftape-recordersonsalethatIcan'tmakeupmymindwhichtobuy. 有这么多的录音机,我都拿不定主意买哪一种。注意:疑问词带不定式在句中作成分时,谓语动词用单数。Thequestionishowtoputitintopractice. 问题是怎样把它付诸实施。不定式作补语1)动词+宾语+不定式(todo) advise allow appoint believe cause pel consider declare drive enable encourage find forbid force guess hire imagine impel induce inform instruct invite judge know like order permit persuade remind report request require select send state suppose tell think train trust understand urge warn 例句: a. Fatherwillnotallowustoplayonthestreet. 父亲不让我们在街上玩耍。 b. Webelievehimtobeguilty. 我们相信他是有罪的。Find的特殊用法:  Find后可用分词做宾补,或先加形式宾语,再加形容词,最后加带to的动词不定式。find后也可带一个从句。此类动词还有get,have。 Ifoundhimlyingontheground.  Ifounditimportanttolearn.  : Thenextmorningshefoundtheman___inbed,dead.   答案:,用分词或分词短语,起宾语补足语作用。现在分词表达主动,也表达正在进行,过去分词表达被动。2)to+be的不定式结构,作补语的动词。 Acknowledge, believe, consider, think, declare(声称), discover,fancy(设想), feel find, g