用心爱心专心121号编辑高二英语语法专练非谓动词动词不定式I.TheFormsoftheInfinitive:1.Theaffirmativeform:to+dosth./dosth.2.Thenegativeform:not(never)todosth./not(never)dosth.3.Theinterrogativeform:wh-/how+todosth.II.TheFunctionsoftheInfinitive1.Subject:(1)Form:(Not)Todosth.+V+…It+V+…+(not)todosth.(2)Examples:Toseeistobelieve.Nottomeethimatthepartymadeusdisappointed.Itisveryimportanttolearnhowtousethecomputer.Ittooktheworkersthreeyearstofinishbuildingthebridge.【Note】Itisonlytheformalsubjectinthesentence.Therealsubjectistheinfinitiveinthelasttwosentences.2.Predicative:(1)Form:S+Be+(not)todosth./dosth.(2)Examples:Thedutyofanurseistotakegoodcareofthepatients.ThepurposeofHopeProjectistohelpthepoorchildreninthecountryside.Thestudents’taskinschoolistostudyhard,nottoplay.Allthattheycandois(to)waitforthenews.WhatIshoulddois(to)helpthosewhoareintrouble.【Note】Whenthesubjectisaclausewiththewords“all,what,do”,theinfinitiveusedaspredicativecanomitthesignoftheinfinitive“to”.3.Object:(1)Form:S+Vt+(not)todosth.S+link.v+adj.+(not)todosth.S+Vt+wh-/howtodosth.=S+V(t)+objectclause.S+Vt+it+adj./n.+todosth.(2)Examples:Theworkersdemandedtogetbetterpay.Theydecidedtostartearlytomorrowmorning.I’msorrytohearthebadnews.Youarefreetogoorstay.Idon’tknowwhattodonext.(=Idon’tknowwhatIshoulddonext.)Theydidn’tdecidehowtogotothestation.(=Theydidn’tdecidehowtheycouldgotothestation.)Ifounditnecessarytotalkwithhimagain.Hefeltitapitynottoseehisformerteacherattheparty.【Note】(1)TheinfinitivefollowsapredicativeadjectiveasObjectinthemiddlesentences.(2)Theinfinitiveusedasobjectwiththeinterrogativewordscanbechangedintoanobjectclause.(3)“It”isonlytheformalobjectinthesentence.Therealobjectistheinfinitiveinthelasttwosentences.4.Complement:(1)Objectcomplement:Form:S+Vt+O+(not)todosth.S+Vt+O+(not)dosth.S+Vt+O+wh-/howtodosth.Examples:Theteachertoldusnottomakenoiseinclass.Thedoctoradvisedmyfathertogiveupsmoking.Mothermademehelpherwithhousework.Isawastrangemanen