什么时候who,what等词后面加to do形式 who to do后接什么词，
who to do\u662f\u4ec0\u4e48\u7ed3\u6784\uff1fwhat to do\u5e76\u4e0d\u662f\u4e00\u4e2a\u53e5\u5b50\uff0c\u800c\u53ea\u662f\u4e00\u4e2a\u540d\u8bcd\u6027\u6210\u5206\uff0c\u4e00\u822c\u79f0\u4e3a \u201c\u7591\u95ee\u8bcd + \u4e0d\u5b9a\u5f0f\u201d \u7ed3\u6784\u3002
\u6240\u4ee5\u4e5f\u5c31\u4e0d\u80fd\u7528\u53e5\u5b50\u7684\u8bed\u6cd5\u6765\u5206\u6790\u8be5\u7ed3\u6784\u4e86\u3002
\u4e0d\u8fc7\u5982\u679c\u653e\u5728\u5177\u4f53\u53e5\u4e2d\u65f6\uff0c\u53ef\u4ee5\u6362\u5199\u6210\u76f8\u5e94\u7684\u540d\u8bcd\u6027\u4ece\u53e5\u3002
\u5982\uff1aI don't know what to do.
= I don't know what I should do.
\u5982\u679c\u7591\u95ee\u8bcd\u4e3a\u4ee3\u8bcd\u65f6\uff0c\u5219\u8981\u6c42\u8be5\u7591\u95ee\u8bcd\u5fc5\u987b\u505a\u4e0d\u5b9a\u5f0f\u4e2d\u67d0\u4e2a\u52a8\u8bcd\u6216\u4ecb\u8bcd\u7684\u5bbe\u8bed\u3002
\u5982\uff1aI don't know whom to send this letter to.
= I don't know whom I should send this letter to.
\u6211\u4e0d\u77e5\u9053\u8be5\u628a\u8fd9\u5c01\u4fe1\u9001\u7ed9\u8c01\u3002
\u4e0d\u63a5\u4ec0\u4e48\uff0c
\u8fd9\u5c31\u662f\u4e00\u4e2a\u53e5\u5b50\u5b8c\u6574\u7684\u90e8\u5206\uff0c
to do what
1.口语有时可以直接使用，如：
what to do next? 接下来做什么呢？
2.一般用作宾语，一般接在一些动词后面，如think, ask, know，decide等
如：
I don't know how to do it.我不知道怎么做。
He is thinking about who to give the speech.他在想谁去做这个演讲。
She asked me how to deal with it.她问我如何处理这个问题。
We want to know when to start. 我们想知道什么时候开始。
She is lost and don't know where to go.她迷路了，不知道去哪里。
森博英语
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绛旓細(1)鍚庨潰鏈塼hat鎴杢hose (2)鍓嶉潰鏈変粙绯昏瘝(EX:in,on...)(3)鍓嶉潰鏈夐楃偣(,)3,what杩欑畻鏄叧浠ｉ噷鏈鐗瑰埆鐨剋hat=鍏堣璇(N)+鍏充唬,涔熷氨鏄浣跨敤what鏃鍓嶉潰涓嶈兘鏈夊悕璇 4,who 鐢ㄦ潵鍙栦唬"浜"鐨,鍙兘鏄"浜"5,whom 鍙楄瘝鍏充唬(鍦ㄤ富瑕佸彞瀛愬綋涓帴鍙楀姩浣滅殑浜)6,when 鐢ㄦ潵璇存槑鏌愪釜鏃堕棿鐐鏃跺浣跨敤 ...
绛旓細鍏崇郴鍓瘝where寮曞瀹氳浠庡彞锛堝寘鎷檺瀹氭у畾璇粠鍙ュ拰闈為檺瀹氭у畾璇粠鍙ワ級淇グ琛ㄧず鍦扮偣鐨勫厛琛岃瘝锛 鍦ㄥ畾璇粠鍙ヤ腑鍏呭綋鍦扮偣鐘惰銆傚湪鍙ヤ腑who灞炰簬鍏崇郴浠ｈ瘝锛寃ho鍙敤浜庢寚浜猴紝涓鑸湪浠庡彞涓綔涓昏銆倃hat鍙妛hat浠庡彞鏄嫳璇腑甯歌鐨勮瑷鐜拌薄銆備竴鑸鏉锛寃hat鍙互鐢ㄤ綔浠ｈ瘝銆佽繛璇嶃佸壇 璇嶅拰褰㈠璇嶃傚洜姝わ紝what鍙互鍏呭綋涓昏銆...
绛旓細who鏄滆皝鈥what鏄浠涔鈥濓紝鍦ㄩ棶鍙ヤ腑鍒嗗埆鎸囦汉鍜岀墿
绛旓細where鎰忔濇槸鈥滃摢鍎库濓紝鐢ㄦ潵璇㈤棶鍦扮偣銆who鐨勬剰鎬濇槸鈥滆皝鈥濓紝鐢ㄦ潵璇㈤棶浜恒佸姩鐗╂垨鐢熺墿绛夋湁鐢熷懡鐨勭墿鍝併倃hen鎰忔濇槸鈥浠涔堟椂鍊鈥濓紝鐢ㄦ潵璇㈤棶鏃堕棿銆what鐨勬剰鎬濇槸鈥滀粈涔堚濓紝鐢ㄦ潵璇㈤棶鐗╁搧鎴栧姩浣溿倃hat涓巘hat鍧囧彲寮曞涓昏銆佽〃璇佸璇粠鍙ワ紝鍖哄埆鏄痺hat鍙湪浠庡彞涓敤浣滀富璇佸璇垨琛ㄨ锛屾剰涓衡滀粈涔堚濇垨鈥滄墍鈥︹︾殑鈥濓紝...
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绛旓細杩炴帴涓嶅畾寮忕殑鐤戦棶璇嶅垎涓轰袱绉嶇被鍨嬶細涓銆佽繛鎺ヤ唬璇嶏紝鍖呮嫭what锛寃ho锛which锛岃繖绫昏瘝涓庝笉瀹氬紡鏈変袱绉嶅叧绯汇1銆佷富璋撳叧绯伙紝濡傦細I don't know who to do it. 鎴戜笉鐭ラ亾璋佽鍋氳繖浠朵簨銆傘愬洜涓篸o 鏄強鐗╁姩璇嶏紝鍚庨潰闇瑕佸璇慖 don't know who to wait. 鎴戜笉鐭ラ亾璋佽绛夈傘愬洜涓簑ait 鏄笉鍙婄墿鍔ㄨ瘝锛屽悗闈笉...
绛旓細who鏄壒娈婄殑锛岃佸笀褰撴椂鏄繖涔堣鐨锛屽悗闈濡傛灉鏄崟涓夛紝鍒欑敤鍗曚笁锛岃繃鍘诲紡涔熺洿鎺ユ帴锛岃屼綘鍚庨潰鐨what鏄鐪嬩綘鍚庨潰鐨勪富璇殑锛屼富璇负the bears 鍜宼he elephants锛屾墍浠ヤ负are
绛旓細what浠涔堬紝where鍝噷锛屼竴鑸〃绀哄湴鐐规椂鐢紝why涓轰粈涔堬紝琛ㄥ師鍥狅紝who璋侊紝琛ㄧず浜虹О锛寃hen褰撯︽椂锛岃〃绀烘椂闂淬傝繖浜涢兘鍙互浣滀负鐤戦棶浠ｈ瘝锛屽悓鏃朵篃鍙湪浠庡彞涓綋鍙ュ瓙鐨勬垚鍒嗐
绛旓細棣栧厛,杩欎釜鍚庨潰鐨刱now搴旇鍔燬, 搴旇鏄who knows what, 瀹冩槸鍔ㄨ瘝涓嶅畾寮忕殑瀹捐浠庡彞锛寃ho鏄富璇紝knows鏄皳璇锛寃hat 鐤戦棶浠ｈ瘝浣滃璇傚叏鍙ユ眽璇剰鎬濇槸锛氱劧鍚庯紝鍦ㄨ皥璇濈殑闂撮殭锛屾湁浜烘嬁鍑烘墜鏈烘煡鐪嬭皝鐭ラ亾鍙戠敓浜浠涔銆
