1、need用法小結(jié)一、用作情態(tài)動(dòng)詞表示必要，后接動(dòng)詞原形，即：need+do1. 通常用在疑問(wèn)句、否定句中。疑問(wèn)式：Need+主語(yǔ)+do否定式：needn't+doNeedyougoyet你一定要去嗎No,Ineedn't.不一定要去。Youneedn'tcleanthehousenow.你不必現(xiàn)在打掃房子。2. need引導(dǎo)的疑問(wèn)句，肯定回答要用must。NeedIcallhimupnow我需要現(xiàn)在給他打電話嗎Yes,youmust.是的，需要打。No,youneedn't.不，不需要現(xiàn)在打。3. needhavedone的否定式或疑問(wèn)式，表示“做了不必做的事”

2、。needn'thavedonesth本不必做某事(事實(shí)上卻做了)Need+主語(yǔ)+havedonesth當(dāng)時(shí)非得做某事嗎你本沒(méi)Youneedn'thavetoldhimbecauseIhadalreadytoldhimaboutit.必要告訴他，因?yàn)槲乙呀?jīng)告訴他這件事了。Needyouhavesoldthehouse你那時(shí)非得把房子賣掉嗎二、用作實(shí)義動(dòng)詞表示需要(require,want,lack)或義務(wù)。1. 可用于肯定句、疑問(wèn)句和否定句?？隙ǎ簄eed+todosth否定：don't/doesn't/didn'tneed+todosth疑問(wèn):do+主

3、語(yǔ)+needtodosthIneedtoconsultadictionary.我需要查詞典。Doessheneedtodothecooking她需要做飯嗎Yes,shedoes.是的，她需要做飯。No,shedoesn't.不，她不必做飯。Shedoesn'tneedtodothecooking.她不必做飯。2. need+名詞Theyneedmyloveandcare.他們需要我的關(guān)愛(ài)。3. needdoing表示被動(dòng)含義。Theclothesneedwashing.這些衣服需要洗了。=Theclothesneedtobewashed.三、用作名詞Weareinneedofyourhelp.我們需要你的幫助。Afriendinneedisafriendindeed.患難見(jiàn)真情。Thereisnoneedtopersuadehimtofollowmyadvice.沒(méi)必要說(shuō)服他采納我的意見(jiàn)。There'snoneedforyoutostartyet.你現(xiàn)在還不必動(dòng)身Thereisn'tmuchneedfo