if的用法 英语If用法
If\u7684\u5404\u79cd\u7528\u6cd5if\u4f5c\u4e3a\u4ece\u5c5e\u8fde\u8bcd,\u53ef\u5f15\u5bfc\u6761\u4ef6\u72b6\u8bed\u4ece\u53e5\u3001\u8ba9\u6b65\u72b6\u8bed\u4ece\u53e5\u548c\u540d\u8bcd\u4ece\u53e5\u3002
if\u5f15\u5bfc\u6761\u4ef6\u72b6\u8bed\u4ece\u53e5,\u4ece\u53e5\u53ef\u4e3a\u771f\u5b9e\u6761\u4ef6\u4ece\u53e5,\u4e5f\u53ef\u4e3a\u865a\u62df\u6761\u4ef6\u4ece\u53e5\u3002\u5982\u4e3a\u771f\u5b9e\u6761\u4ef6\u4ece\u53e5,\u8c13\u8bed\u7528\u9648\u8ff0\u8bed\u6c14,\u8868\u793a\u53ef\u80fd\u6027\u5f88\u5927,\u4f5c\u201c\u5047\u4f7f\u201d\u201c\u5982\u679c\u201d\u89e3,\u901a\u5e38\u7528\u4e00\u822c\u73b0\u5728\u65f6\u4ee3\u66ff\u4e00\u822c\u5c06\u6765\u65f6\u3002
\u5982\u679cif\u4ece\u53e5\u4e2d\u7528will,\u8868\u793a\u610f\u613f\u3002\u4ece\u53e5\u5982\u4e3a\u865a\u62df\u6761\u4ef6\u4ece\u53e5,\u8c13\u8bed\u52a8\u8bcd\u8981\u7528\u865a\u62df\u8bed\u6c14,\u8868\u793a\u53ef\u80fd\u6027\u4e0d\u5927\u6216\u4e0e\u8fc7\u53bb\u4e8b\u5b9e\u76f8\u53cd,\u4f5c\u201c\u8981\u662f,\u5047\u5982\u201d\u89e3\u3002
if\u5f15\u5bfc\u7684\u6761\u4ef6\u4ece\u53e5\u4e2d\u53ef\u4ee5\u7701\u7565be\u548c\u4e3b\u8bed\u3002
if\u53ef\u5f15\u5bfc\u8ba9\u6b65\u72b6\u8bed\u4ece\u53e5,\u4f5c\u201c\u867d\u7136,\u5373\u4f7f\u201d\u89e3,\u5e38\u548ceven\u8fde\u7528\u3002
if\u53ef\u5f15\u5bfc\u540d\u8bcd\u6027\u4ece\u53e5,\u4f5c\u201c\u662f\u5426\u201d\u89e3,\u5e38\u653e\u5728ask, doubt, know, learn, see, wonder\u7b49\u52a8\u8bcd\u540e\u3002\u4e00\u822c\u7528\u5728\u53e3\u8bed\u4e2d,\u800c\u4e14\u4e0d\u80fd\u7528\u4e8e\u53e5\u9996\u3002
if\u53ef\u4ee5\u8868\u793a\u60ca\u5947\u6216\u6124\u6012\u3002\u7528\u4e8e\u9648\u8ff0\u8bed\u6c14\u7684\u5426\u5b9a\u53e5\u65f6,\u610f\u4e49\u5219\u662f\u80af\u5b9a\u7684\u3002
If ever...\u5728\u73b0\u4ee3\u82f1\u8bed\u4e2d,\u8868\u793a\u5f3a\u8c03,\u7528\u4e8e\u52a0\u5f3a\u4e3b\u53e5\u7684\u610f\u601d,\u5f80\u5f80\u542b\u6709\u5426\u5b9a\u610f\u601d\u3002
\u6269\u5c55\u8d44\u6599\uff1a
if, in case\u8fd9\u4e24\u4e2a\u8bcd(\u7ec4)\u7684\u5171\u540c\u610f\u601d\u662f\u201c\u4ee5\u9632\u4e07\u4e00\u201d\u3002\u4e8c\u8005\u5747\u53ef\u5f15\u5bfc\u6761\u4ef6\u4ece\u53e5\uff0c\u8fa8\u6790\u5982\u4e0b\uff1a
if\u53ef\u7528\u4e8e\u4efb\u4f55\u65f6\u95f4,\u800cin case\u53ea\u6307\u5c06\u6765\u65f6\u95f4\u3002\u4f8b\u5982:
I am taking an umbrella in case it rains later on.
\u6211\u5e26\u7740\u4e00\u628a\u4f1e,\u4ee5\u9632\u4e00\u4f1a\u513f\u4e0b\u96e8\u3002
I'll take an umbrella if it rains later on.
\u8981\u662f\u4e00\u4f1a\u513f\u4e0b\u96e8,\u6211\u5c31\u62ff\u628a\u4f1e\u3002
if, whether\u8fd9\u4e24\u4e2a\u8bcd\u7684\u5171\u540c\u610f\u601d\u662f\u201c\u5047\u4f7f,\u5982\u679c\u201d\u3002\u8fa8\u6790\u5982\u4e0b\uff1a
1.if\u4ece\u53e5\u53ef\u4ee5\u8868\u793a\u5e0c\u671b; \u800cwhether\u4ece\u53e5\u5355\u7eaf\u8868\u793a\u4e8b\u5b9e\u3002
2.if\u4e0d\u80fd\u7528\u5728\u4ecb\u8bcd\u4e4b\u540e\u7684\u95f4\u63a5\u7591\u95ee\u53e5\u4e2d; \u800cwhether\u53ef\u4ee5\u3002
3.if\u4e0d\u80fd\u7528\u5728\u201cto+\u52a8\u8bcd\u539f\u5f62\u201d\u7684\u524d\u9762; \u800cwhether\u53ef\u4ee5\u3002
4.if\u4e0d\u80fd\u5f15\u5bfc\u4e3b\u8bed\u3001\u8868\u8bed\u4ece\u53e5; \u800cwhether\u53ef\u4ee5\u3002
if\u6700\u5e38\u89c1\u7684\u7528\u6cd5\uff0c\u5c31\u662f\u7528\u6765\u8868\u8fbe\u201c\u5047\u5982\u3001\u5982\u679c\u201d\u7684\u610f\u601d\u3002if\u8fd8\u6709\u53e6\u5916\u4e00\u4e2a\u7528\u6cd5\uff0c\u90a3\u5c31\u662f\u201c\u662f\u5426\u201d\u7684\u610f\u601d\uff0c\u8ddfwhether\u7528\u6cd5\u5dee\u4e0d\u591a\uff0c\u7528\u4e8e\u5f15\u51fa\u4ece\u53e5\u3002\u5206\u4eab\u514d\u8d39\u6b27\u7f8e\u5916\u6559\u4e00\u5bf9\u4e00\u8bfe\u7a0b\u7ed9\u5927\u5bb6\uff1a\u3010\u514d\u8d39\u9886\u53d6\uff0c\u5916\u6559\u4e00\u5bf9\u4e00\u7cbe\u54c1\u8bfe\u7a0b\u3011\uff0c\u8ddf\u7740\u5916\u6559\u5b66\u4e60\u5730\u9053\u7684\u53d1\u97f3\u3002\u963f\u5361\u7d22\u4e3b\u6253\u5728\u7ebf\u5916\u6559\u4e00\u5bf9\u4e00\u6388\u8bfe\uff0c\u4e00\u5bf9\u4e00\u6388\u8bfe\u6a21\u5f0f\u9488\u5bf9\u6027\u5f3a\uff0c\u5916\u6559\u80fd\u7b2c\u4e00\u65f6\u95f4\u4e86\u89e3\u5927\u5bb6\u7684\u5b66\u4e60\u60c5\u51b5\uff0c\u5e76\u968f\u65f6\u8fdb\u884c\u8bfe\u7a0b\u8c03\u6574\uff0c\u5236\u5b9a\u5408\u7406\u7684\u5b66\u4e60\u8ba1\u5212\uff0c\u5b66\u5458\u4e5f\u80fd\u8f7b\u677e\u5b66\uff01\u70b9\u51fb\u4e0a\u8ff0\u84dd\u5b57\u94fe\u63a5\u53ef\u4ee5\u9886\u53d6\u514d\u8d39\u5916\u6559\u8bfe\u4e00\u8282\u3002\u4e0d\u77e5\u9053\u5982\u4f55\u9009\u62e9\u82f1\u8bed\u673a\u6784\uff0c\u53ef\u4ee5\u767e\u5ea6\u54a8\u8be2\u201c\u963f\u5361\u7d22vivi\u8001\u5e08\u201d\uff1b\u5982\u679c\u60f3\u4e0b\u8f7d\u514d\u8d39\u82f1\u8bed\u8d44\u6e90\uff0c\u53ef\u4ee5\u767e\u5ea6\u641c\u7d22\u201c\u963f\u5361\u7d22\u5b98\u7f51\u8bba\u575b\u201d\u3002
（表条件）如果；即使；是否；（表假设）假如
(引导条件从句) 如果
例：You can go if you want.
如果你想走就走吧。
(用于间接是非问句中) 是否
例：He asked if I had left with you, and I said no.
他问我是不是和你一起离开的，我说不是。
常与can、could、may、might等情态动词连用，表示婉转客气
例：If I could just make another small point about the weightlifters in the Olympics.
请允许我就奥运会的举重运动员们再稍说一句。
(用于从句句首或靠近句首的位置，表示礼貌的请求) 是否
例：I wonder if you'd be kind enough to give us some information, please?
不知能否请您向我们提供些信息？
(引导从句，提出次要的事实) 即使
例：If there was any disappointment it was probably temporary.
即使有任何遗憾，可能也是暂时的。
(尤指不能实现的愿望) 要是…多好
例：If only you had told me that some time ago.
要是你之前告诉我那件事该多好。
(表示判断) 好像
例：It looked as if she had forgotten how to breathe.
她看上去好像是忘了如何呼吸似的。
[表示条件或假设]如果；假如，倘若，要是：
例：If I knew, I would say.
如果我知道，我就说了。
例：If I were you, I would have failed.
如果我是你，我可能会失败的。
尽管；虽然；即使：
例：If he is little, he is strong.
他尽管年纪小，力气倒蛮大的。
例：If I am wrong, you are not right.
即使我错了，你也不对。
绛旓細conj.濡傛灉, 鍋囧 If only I had gone by taxi.鍋囪嫢鎴戞槸涔樿绋嬭溅鍘荤殑灏卞ソ浜嗐侷f necessary, give me a ring.濡傛灉闇瑕, 鎵撲釜鐢佃瘽缁欐垜銆侷f ever eyes could speak, hers did very plainly.濡傛灉璇寸溂鐫涜兘璇磋瘽, 濂圭殑鐪肩潧鍙寰楁竻妤氭瀬浜嗐傛槸鍚 I will see if he wants to talk to you.鎴戝幓浜嗚В...
绛旓細if 锛堣〃鏉′欢锛夊鏋滐紱鍗充娇锛涙槸鍚︼紱锛堣〃鍋囪锛夊亣濡 (寮曞鏉′欢浠庡彞) 濡傛灉 渚嬶細You can go if you want.濡傛灉浣犳兂璧板氨璧板惂銆(鐢ㄤ簬闂存帴鏄潪闂彞涓) 鏄惁 渚嬶細He asked if I had left with you, and I said no.浠栭棶鎴戞槸涓嶆槸鍜屼綘涓璧风寮鐨勶紝鎴戣涓嶆槸銆傚父涓巆an銆乧ould銆乵ay銆乵ight绛夋儏鎬佸姩璇...
绛旓細conj.(杩炶瘝)1銆if浣滀负浠庡睘杩炶瘝,鍙紩瀵兼潯浠剁姸璇粠鍙ャ佽姝ョ姸璇粠鍙ュ拰鍚嶈瘝浠庡彞銆2銆乮f寮曞鏉′欢鐘惰浠庡彞锛屼粠鍙ュ彲涓虹湡瀹炴潯浠朵粠鍙,涔熷彲涓鸿櫄鎷熸潯浠朵粠鍙ャ傚涓虹湡瀹炴潯浠朵粠鍙ワ紝璋撹鐢ㄩ檲杩拌姘旓紝琛ㄧず鍙兘鎬у緢澶э紝浣溾滃亣浣库濃滃鏋溾濊В锛岄氬父鐢ㄤ竴鑸幇鍦ㄦ椂浠ｆ浛涓鑸皢鏉ユ椂锛涘鏋渋f浠庡彞涓敤will锛岃〃绀烘剰鎰裤備粠鍙ュ涓鸿櫄鎷...
绛旓細涓銆if浣滀负杩炶瘝锛屽紩瀵兼潯浠剁姸璇粠鍙ワ紝瀹冭〃绀虹殑鎰忔濇槸鈥滃亣濡傗濃滃鏋溾濈瓑銆傚湪澶嶅悎鍙ヤ腑濡傛灉涓诲彞鐢ㄥ皢 鏉ユ椂锛屽垯if寮曞鐨勭姸璇粠鍙ョ敤涓鑸幇鍦ㄦ椂銆備緥濡傦細1. If itdoesn鈥檛rain, we will go to the park next Sunday. 濡傛灉澶╀笉涓嬮洦锛屼笅鍛ㄦ槦鏈熷ぉ鎴戜滑灏嗗幓鍏洯銆2. If you ask him锛宧e will help you锛...
绛旓細if 鑻 [ɪf] 缇 [ɪf]conj. 锛堣〃鏉′欢锛夊鏋滐紱锛堣〃鍋囪锛夎鏄紝鍋囧锛涙棤璁轰綍鏃讹紱铏界劧锛屽嵆浣匡紱锛堢敤浜庨棿鎺ョ枒闂級鏄惁锛涳紙鐢ㄤ簬绀艰矊闂锛夋槸鍚︼紱褰擄紝姣忔锛涳紙涓庢儏鎬佸姩璇嶈繛鐢級琛ㄥ杞姘旓紱杩欎笉鏄︹︼紝瑕佹槸鈥︹﹀濂斤紱鎴栬涓嶏紱灏辩畻锛涘敖绠 n. 鏉′欢锛岃鎯筹紱涓嶇‘瀹氱殑鎯呭喌 璇嶇粍鐭 as if...
绛旓細铏氭嫙璇皵if鐨涓夌鐢ㄦ硶锛氳〃绀轰笌鐜板湪浜嬪疄鐩稿弽鐨勬儏鍐碉紱琛ㄧず涓庤繃鍘讳簨瀹炵浉鍙嶇殑鎯呭喌锛涜〃绀轰笌灏嗘潵浜嬪疄鐩稿弽銆傚叿浣撳涓嬶細1銆佽〃绀轰笌鐜板湪浜嬪疄鐩稿弽鐨勬儏鍐碉細浠庡彞锛歩f+涓昏+鍔ㄨ瘝涓鑸繃鍘绘椂(Be鍔ㄨ瘝鐢╳ere).涓诲彞锛氫富璇+should/would/might/could+do.2銆佽〃绀轰笌杩囧幓浜嬪疄鐩稿弽鐨勬儏鍐碉細浠庡彞锛歩f+涓昏+had+done.涓诲彞锛氫富璇+...
绛旓細if conj.[琛ㄧず鏉′欢, 鍋囪]濡傛灉, 瑕佹槸; 鍋囧 [琛ㄧず璁╂]铏界劧; 鍗充娇 鏄惁, 鏄笉鏄 (锛漺henever)鏃犺浣曟椂; 褰 [琛ㄧず鎰挎湜, 鎰熷徆]瑕佹槸...澶氬ソ If weather permits...(甯哥暐浣淚.W.P)濡傛灉澶╂皵濂界殑璇...I'll do it if I die in the attempt.鍗充娇浼氫抚鍛芥垜涔熻璇曚竴涓嬨侫sk if he is at...
绛旓細涓銆if浣滀负杩炶瘝杩樺彲浠ュ紩瀵煎璇粠鍙ワ紝鎰忎负鏄惁銆傚紩瀵煎璇粠鍙ユ椂鍜寃hether鎰忔濈浉鍚屻備緥濡傦細Lily asked if 锛 whether she liked it.鑾夎帀闂ス鏄惁鍠滄瀹冦備簩銆乮f杩樺彲浠ュ紩瀵艰姝ョ姸璇粠鍙ャ傝繖鏃秈f褰撲綔鈥滃嵆浣挎槸鈥濓紝鈥滆櫧璇粹濊В銆備緥濡傦細If she鈥檚 poor锛宎t least she鈥檚 honest锛庤櫧璇村ス寰堢┓锛屼絾鑷冲皯濂硅繕鏄瘹瀹...
绛旓細if浣滀负浠庡睘杩炴帴璇嶏紝鏈変袱绉鐢ㄦ硶銆備竴銆佸仛鈥滄槸鍚︹濊В閲婏紝寮曞鍔ㄨ瘝鐨勫璇粠鍙ワ紝鍚庤窡闄堣堪鍙ョ殑璇簭锛岀浉褰撲簬涓鑸枒闂彞銆傚畠寮曞鐨勫彞瀛愶紝鎸夌収鏃堕棿鏉ラ夋嫨鏃舵併傚锛欻e asked if I had left with you, and I said no.浠栭棶鎴戞槸鍚﹀拰浣犱竴鍧楀効绂诲紑鐨勶紝鎴戣涓嶆槸銆侷 wonder if I might have a word with Mr ...
绛旓細IF 鍑芥暟鏄 銆岃〃鏍硷紙Excel锛夈 涓渶甯哥敤鐨勫嚱鏁颁箣涓锛屽畠鍙互瀵瑰煎拰鏈熷緟鍊艰繘琛岄昏緫姣旇緝銆傚洜姝 IF 璇彞鍙兘鏈変袱涓粨鏋溿 绗竴涓粨鏋滄槸姣旇緝缁撴灉涓 True锛岀浜屼釜缁撴灉鏄瘮杈冪粨鏋滀负 False銆備緥濡傦紝=IF(C2=鈥漎es鈥,1,2) 琛ㄧず IF(C2 = Yes, 鍒欒繑鍥 1, 鍚﹀垯杩斿洖 2)銆傝娉曡鏄庯細浣跨敤閫昏緫鍑芥暟 IF 鍑芥暟鏃...
