can和could的区别有哪些？
1、时态不同
从时态形式来看，can 只有现在式和过去式(could)，而 be able to 则可根据需要使用多种时态，还可以和一些情态动词连用，或用作动词不定式等非谓语形式。could是can 的过去式。
I haven't been able to sleep recently. 最近我睡不着觉。
He can swim. 他会游泳。
He couldn't be a bad man.他不大可能是坏人。
2、含义不同
用于现在时，can 泛指一般的能力，而 be able to 则主要指具体做某件事的能力。could不表示时态。
He can swim. 他会游泳。
I am able to express my idea in a clear way. 我能清楚地表达自己的想法。
Could I have the television on?你能打开电视吗？
3、表能力时不同
如果要表示"一时的能力"，即"在过去某时有某种能力，并顺利地完成某事"，则要用 was / were able to，而不能用 could。could 表示可能或有能力做。
Though he was sick, he was able to swim across the river. 虽然他病了，但他还是游过了河。
I could pass the examination. 我当时有能力通过考试。（有能力，但实际上不一定做得到）
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绛旓細She could play the piano when she was five.2銆佸湪琛ㄧず璇锋眰璁稿彲鏃,娌℃湁鏃堕棿鍖哄埆,鍦ㄨ姘斾笂could 鏇村姞濮斿瀹㈡皵,渚嬪锛Can I use your pen Could I have a look at your book 3銆佸湪琛ㄧず鍙兘鎬ф柟闈,娌℃湁鏃堕棿鍖哄埆,can 鍙兘鎬ф瘮could 澶э紱1銆乧an 琛ㄧず鐜板湪鐨勮兘鍔,could 琛ㄧず杩囧幓鐨勮兘鍔,渚嬪锛欻e ...
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绛旓細can鍜宑ould鐨勫尯鍒鍜岀敤娉曞涓嬶細can鍜宑ould鐨勫尯鍒负鎰忔濅笉鍚屻佺敤娉曚笉鍚屻佷晶閲嶇偣涓嶅悓锛岀敤娉曞涓嬶細涓銆佹剰鎬濅笉鍚 1銆乧an锛(琛ㄧず鏈夎兘鍔涘仛鎴栬兘澶熷彂鐢)鑳斤紝浼氾紝(琛ㄧず鐭ラ亾濡備綍鍋)鎳傚緱锛屼笌鍔ㄨ瘝銆2銆乧ould锛氱敤浜巆an鐨勮繃鍘绘椂锛(璇㈤棶鏄惁鍙仛鏌愪簨)鑳斤紝鍙互锛(绀艰矊鍦拌姹傚埆浜哄仛浜)鑳姐備簩銆佺敤娉曚笉鍚 1銆乧an锛歝an...
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绛旓細鍦ㄨ繖绉嶆儏鍐典笅,could鍜宑an鏄彲浠ユ崲鐢ㄧ殑,鐢╟ould鏃跺彛姘旇緝缂撳拰,鐢╟an鏃朵笉鐩镐俊鐨勭▼搴︽洿寮轰竴浜,涓よ呭湪鏃堕棿涓婃病鏈宸埆.3.姣旇緝濮斿瀹㈡皵鍦版彁鍑洪棶棰樻垨闄堣堪鐪嬫硶.濡傦細/P> 鈥Could you let me have your passport?鈥擸es,here it is.鈥旂湅鐪嬩綘鐨勬姢鐓уソ鍚?鈥旇,杩欏氨鏄.I could come earlier,if necessary....
绛旓細杩欎袱涓瘝鐨勫尯鍒鎴戞噦锛宑an琛ㄧず鐨勬槸鑲畾鐨勪簨瀹炴垨鑳藉姏锛岃宑ould鍒欒〃绀鸿繃鍘绘垨鏈潵鐨勬垨鍋囪鎬х殑鎯呭喌锛屽彲鑳戒細浜х敓鎬鐤戞垨涓嶈偗瀹氱殑鍚箟銆傜粰澶у绠鍗曟荤粨浜嗕袱涓瘝鐨勫惈涔夈佸彂闊充互鍙婄敤娉曪紝鍏堝ぇ姒傜殑浜嗚В涓涓媬~鎺ヤ笅鏉ヨ鎴戜滑鐪嬩笅can鍜宑ould鐨鍏朵粬鍖哄埆锛1. 鏃舵佷笉鍚岋細can琛ㄧず鐨勬槸鐜板湪鏃舵佹垨灏嗘潵鏃舵侊紱鑰宑ould鍒欐槸杩囧幓...
绛旓細杩欎袱涓瘝鐨勫尯鍒鎴戞噦锛 "Can" 鐢ㄤ簬琛ㄧず鍙兘鎬у拰鎺ㄦ祴锛岀壒鍒槸鍦ㄦ病鏈夌‘鍑胯瘉鎹殑鎯呭喌涓嬨"Could" 鍦ㄨ繖涓敤娉曚笂鏇村鍦拌〃绀烘帹娴嬫垨鏈夋潯浠剁殑鍙兘鎬с傜粰澶у绠鍗曟荤粨浜嗕袱涓瘝鐨勫惈涔夈佸彂闊充互鍙婄敤娉曪紝鍏堝ぇ姒傜殑浜嗚В涓涓媬~鎺ヤ笅鏉ヨ鎴戜滑鐪嬩笅can鍜宑ould鐨鍏朵粬鍖哄埆锛1. 鏃舵佸拰璇皵涓嶅悓锛- "Can" 鏄幇鍦ㄦ椂鎬佺殑鎯呮...
绛旓細can涓巆ould鐨勫尯鍒濡備笅锛欳an鍜宑ould閮芥槸鑻辫涓父鐢ㄧ殑鎯呮佸姩璇嶏紝閫氬父鐢ㄦ潵琛ㄧず鑳藉姏銆佸彲鑳芥с佽姹傜瓑銆傝櫧鐒朵袱涓瘝閮芥湁琛ㄧず鍙兘鎬х殑鍚箟锛屼絾鏄畠浠湪浣跨敤涓婅繕鏄暐鏈夊尯鍒殑銆1銆丆an琛ㄧず涓鑸殑鑳藉姏鍜屽厑璁告э紝could鍒欒〃绀鸿繃鍘绘垨鍙兘鐨勬儏鍐点傛瘮濡傦細I can swim.锛堟垜浼氭父娉炽傦級He could play the piano very well ...
