否定句否定句一、概念否定句指表示否定意义的句子。二、相关知识点精讲1.用not构成的否定句：主语+助动词/情态动词/be+not+…例句：Heisnotbackyet.Itisnottrue.Wehaven’tforgottenyou.Youshouldn’tbesosilly.Wehaven’tbeeninvitedyet.Hewon’tgo,buttheywill.Moneycouldnotbuyhappiness.Ilikethesalad,butIdon’tlikethissoup.Hewantsagirlfriend,buthedoesn’twanttogetmarried.Youdidn’tunderstandwhatIsaid,didyou?Youneedn’ttrytoexplain.Ididn’tusetolikeopera,butnowI’mgettinginterested.Iusedn’ttolikeopera,butnowI’mgettinginterested.2.祈使句的否定句：Don’t+动词原形…。例句：Don’tworry.I’lllookafteryou.Don’tbelieveawordhesays.Don’tbesorude.3.非谓语动词（不定式，分词，动名词）的否定式：把not放在todo;doing;的前面It’simportantnottoworry.Hesaidhedeeplyregrettednotbeingabletohelp.Notknowingwhattodo,Shellyaskedadviceofherfriend.Hereproachedmefornothavingtoldittohim.4.not与除谓语以外的其他句子成分连用：Comeearly,butnotbeforesix.It’sworking,butnotproperly.Ibelievehewillsucceed,thoughnotwithoutsomedifficulty.not用在Ihope;Ibelieve;I’mafraid;Iguess;Isuppose;Iexpect之后，构成省略句—Willitsnowtoday?—Ihopenot.5.用no构成否定句：no+名词（单，复数，不可数）相当于not+a+名词/not+any+名词Nomachinewouldworkforlongifitwerenotproperlylubricated.ThenationsofEuropeandAmericahavefoundthatnocountrycanproduceallitsneedswithouttrading.Takethattowel,Ihavenoother.Icanwalknofarther.Thereisnoknowingwhatwillhappen.6.某些否定副词或代词：seldom;never;hardly;rarely;little;few;none;nowhere;neither等在句中构成否定句：Icanseldomfindtimeforreading.Mirrortellsonlythefacts,neverthepoetry.Therumorcamefromnowhere.Nonebutfoolshaveeverbelievedit.7.否定转移：当think;believe;suppose;imagine等动词引导否定意义的宾语从句时，把从句中的not提到主句这些动词前面，是主句变成否定句：Idon’tthinkshe’sathome,butI’llgoandsee.Idon’timaginethathe’llenjoyit.8.否定式疑问句：Doesn’tsheunderstand?Haven’tyoubookedyourholidayyet?9.部分否定：注意部分否定的结构：Notall…=All…not…Notboth…=Both…not…Notevery…=Every…not…Idon’trememberallthenames.Allisnotgoldthatglitters.Itisnotfoundeverywhere.Noteveryonelikesthisfilm.10.用否定形式表示肯定的意义：注意这些句型：cannot…too../cannot…more:越…就越好；再…不过了。Youcannotbetoocareful.Amancanneverhavetoomanyfriends.特别注意：1．部分否定和全部否定1）当all,both,every,everybody,everything,each等代词及always,wholly,everywhere等副词出现在句中时，谓语动词的否定形式只表示部分否定，意为“不都是，不总是，并非全”等。Thisbookisnottobefoundeverywhere./Alltheseanswersarenotcorrect.2）具有否定意义的代词、副词或短语，如：no,none,nobody,nothing,neither,never,nowhere等，词组如：freefrom，farfrom，wouldrather……than等。Neitherofthemismyfriend./Nobodyisfondofthebook.Theproblemisfarfromdifficult./Themedicinesethimfreefrompain.2．否定形式表示肯定意义1）nosooner…than,hardly/scarcely/barely…when表示“一……就”Nosoonerhadtheyrushedoutofthehousethantheearthquakehappened.2）Cannot…too,cannot…enough表示“越……越好，无论怎么……也不过分”。Johnissuchagoodstudentthatwecan’tpraisehimtoomuch./Youcannotbecarefulenough.3）Nothingmorethan表示“仅仅是，非常”Thereisnothinghelikesmorethanacupoftea.4）No/noneotherthan表示“正是，不是……正是”Thisisnootherthanthenewspaperyouwant./Sheisnoneotherthanmydaughter.5）Nothingbut/except与nonebut意为“仅仅，只有……才”TheboyswanttodonothingbutwatchTV./Nonebutafoolwoulddosuchathing....
