如何判断need是情态动词还是实义动词
“need”既可以作情态动词，也可以作实义动词，但是它们的用法不同。
作为情态动词的“need”的用法与其他情态动词“can”，“may”，“must”的用法基本相同:在限定动词词组中总是位居第一，没有非限定形式，即没有不定式、-ing分词或-ed分词等形式;第三人称单数现在时没有词形变化;情态动词之间是相互排斥的，即在一个限定动词词组中只能有一个情态动词。下面是“need”作为情态动词的用法:
一、need表示“需要”或“必须”，通常用于否定句和疑问句。例如:
1.You needn't do it again.你不需要再做了。
2.He needn't worry about it.这件事他无需担心。
3.Need he do this homework first?他需要先做这些作业吗?
4.Need they fill in the form?他们需要填表吗?
二、在否定句中，可以用need的否定形式+不定式完成体。例如:
1.We needn't have worried.其实我们不必要慌。
2.You needn't have mentioned it.你本来不必提起这件事。
3.You needn't have said that when he asked.当他问的时候，你其实不必要说。
三、needn't后的不定式间或也能用进行式或被动语态。例如:
1.He needn't be standing in the rain.他不必要站在雨中。
2.We needn't be waiting in this place.我们不必要在这儿等。
3.The hedges needn't be trimmed thisweek.本周树蓠不必要整修。
绛旓細鍒ゆ柇need鏄瀹炴剰杩樻槸鎯呮鐨勬柟娉曞涓嬶細1銆佸綋neea(闇瑕)鏄疄涔夊姩璇嶇殑鏃跺欙細鍙ュ瓙閲屾湁绗笁浜虹О鍗曟暟灏辫灏眘'鏈塨e灏+ing锛屽弽姝ｄ粬TA褰撳姩璇嶇湅銆2銆佽宯eed (闇瑕)鏄儏鎬佸姩璇鐨勬椂鍊欙細 TA鐨勭敤娉曞氨鍜宑an銆乨oes' t銆乵ust锛屽拰鍒殑鎯呮佸姩璇嶄竴鏍凤紝鍦ㄥ彞涓笉鍙椾换浣曚汉绉帮紝鎬э紝鏁板彉鍖栫殑褰卞搷銆佸湪鍙ヤ腑灏变繚鎸佸師褰
绛旓細浣滀负鎯呮佸姩璇鐨勨need鈥濈殑鐢ㄦ硶涓庡叾浠栨儏鎬佸姩璇嶁渃an鈥,鈥渕ay鈥,鈥渕ust鈥濈殑鐢ㄦ硶鍩烘湰鐩稿悓锛氬湪闄愬畾鍔ㄨ瘝璇嶇粍涓绘槸浣嶅眳绗竴,娌℃湁闈為檺瀹氬舰寮,鍗虫病鏈変笉瀹氬紡銆-ing鍒嗚瘝鎴-ed鍒嗚瘝绛夊舰寮忥紱绗笁浜虹О鍗曟暟鐜板湪鏃舵病鏈夎瘝褰㈠彉鍖栵紱鎯呮佸姩璇嶄箣闂存槸鐩镐簰鎺掓枼鐨,鍗冲湪涓涓檺瀹氬姩璇嶈瘝缁勪腑鍙兘鏈変竴涓儏鎬佸姩璇.涓嬮潰鏄渘eed鈥...
绛旓細need鐢ㄤ綔鎯呮佸姩璇鏃讹紝鍚庢帴鍔ㄨ瘝鍘熷舰锛屾鏃跺叾娌℃湁浜虹О鍜屾暟鐨勫彉鍖栵紝閫氬父鐢ㄤ簬鍚﹀畾鍙ュ拰鐤戦棶鍙ヤ腑銆備緥濡傦細Need I come back home now?鎴戠幇鍦ㄩ渶瑕佸洖瀹跺悧锛焠eed鍦ㄨ偗瀹氬彞涓敤浣滃疄涔夊姩璇嶃備緥濡傦細The car needs washing=The car needs to be washed.杩欒締杞﹂渶瑕佹礂涓涓嬨
绛旓細2. 濡傛灉 "need" 鍚庨潰鐩存帴璺熷姩璇嶅師褰紝涓斾富璇槸绗笁浜虹О鍗曟暟锛屾纭殑鍔ㄨ瘝褰㈠紡鍚屾牱鏄 "needs to do"銆傝繖绉嶆儏鍐典笅锛"need" 浣滀负鎯呮佸姩璇浣跨敤銆3. 鍦ㄥ惁瀹氬彞涓紝濡傛灉浣跨敤 "does not need to do" 鎴 "doesn't need to do"锛岃繖琛ㄧず瀹炴剰鍔ㄨ瘝鐨勫惁瀹氬舰寮忋4. 濡傛灉浣跨敤 "need not do"锛岃繖琛ㄧず鎯呮...
绛旓細1锛need浣鎯呮佸姩璇鏃犱汉绉版垨鏁扮殑鍙樺寲锛 鍚庢帴鍔ㄨ瘝鍘熷舰锛屽鐢ㄤ簬鍚﹀畾鍙ュ拰鐤戦棶鍙ヤ腑銆傚锛歒ou needn't worry.浣犱笉蹇呮媴蹇冦2锛庣敱need寮曞嚭鐨勪竴鑸枒闂彞锛岃偗瀹氬洖绛斿父鐢╩ust鎴杊ave to;鍚﹀畾绛旇甯哥敤needn't.濡傦細鈥Need I answer the question? 鎴戦渶瑕佸洖绛旈偅涓棶棰樺悧锛熲擸es, you must. /Yes, you have to....
绛旓細鐪嬪悗闈㈡槸鍚︾洿鎺ヨ窡瀹捐锛屽悗闈㈢洿鎺ヨ窡瀹捐鐨勬槸瀹炴剰鍔ㄨ瘝锛屽悗闈㈣窡鍔ㄨ瘝鐨鏄儏鎬佸姩璇锛屽锛欼 need your help(瀹炴剰),You need help me(鎯呮)
绛旓細need浣鎯呮佸姩璇鏃讹紝鍚庨潰鎺ョ殑鏄姩璇嶇殑鍘熷舰锛屼富瑕佺敤浜庡惁瀹氬彞鍜岀枒闂彞锛屽锛'I'll put the key in the window.' 鈥 'You needn't bother,' he said gruffly.鈥滄垜浼氭妸閽ュ寵鏀惧湪绐楁埛閲屻傗濃斺斺滀笉蹇呴夯鐑︿簡锛屸濅粬绮楀０璇撮亾銆侺ook, you needn't shout.鍡紝浣犱笉蹇呭ぇ鍠婂ぇ鍙係he need not know I'm...
绛旓細鎯呮佸姩璇鏃舵病鏈夊彉鍖栧舰寮忥紝鍚庡姞鍔ㄨ瘝鍘熷舰锛屽父鐢ㄤ簬鍚﹀畾鍙ュ拰鐤戦棶鍙ヤ腑銆俌ou needn't buy the tickets.瀹炰箟鍔ㄨ瘝鏃舵湁浜虹О鏃舵佺瓑鍙樺寲褰㈠紡锛屽惁瀹氱枒闂椂瑕佺敤鍒板姪鍔ㄨ瘝銆俉e need two books.He didn't need to take part in the club.Tom needs a pen to write down the plan.Do you need to clean up ...
绛旓細鐪嬪悗杈规墍鎺ョ殑璇嶈鐨勫舰寮,姣斿璇达細The garden needs watering.锛堝疄鎰忓姩璇嶏級You needn't trouble about that.锛堟儏鎬佸姩璇嶏級绗竴鍙ヨ瘽need鍚庤竟鏄敤鐨勫姩璇嶇殑ing褰㈠紡,鎵浠ユ槸瀹炴剰鍔ㄨ瘝 绗簩鍙ヨ瘽need鍚庤竟鏄敤鐨勫姩璇嶅師褰,鎵浠鏄儏鎬佸姩璇
绛旓細浣滀负鎯呮佸姩璇鐨勨need鈥濈殑鐢ㄦ硶涓庡叾浠栨儏鎬佸姩璇嶁渃an鈥濓紝鈥渕ay鈥濓紝鈥渕ust鈥濈殑鐢ㄦ硶鍩烘湰鐩稿悓锛氬湪闄愬畾鍔ㄨ瘝璇嶇粍涓绘槸浣嶅眳绗竴锛屾湁need to do sth锛涚涓変汉绉板崟鏁扮幇鍦ㄦ椂娌℃湁璇嶅舰鍙樺寲锛涙儏鎬佸姩璇嶄箣闂存槸鐩镐簰鎺掓枼鐨勶紝鍗冲湪涓涓檺瀹氬姩璇嶈瘝缁勪腑鍙兘鏈変竴涓儏鎬佸姩璇嶃備笅闈㈡槸need 鐨勫叿浣撶敤娉 2鐢ㄤ綔鍔ㄨ瘝鎯呮佸姩璇 涓銆...
