if引导的虚拟语气
if引导的虚拟语气如下：
1、现在时:当if引导的虚拟语气表示与现在事实相反时，主句谓语用could、would、shoul d或mi ght加动词原形，条件从句中的谓语用过去式。
2、过去时:当if引导的虚拟语气表示与过去事实相反时，主句谓语用could、would、shoul d或mi ght加have再加动词原形。
3、将来时:当if引导的虚拟语气表示与将来事实相反时，主句谓语用could、would、shoul d或mi ght加动词原形，条件从句中的谓语用过去式。
虚拟语气中，表条件的状语从句的if可以省略，但主语必须与动词易位（也就是倒装）：
If it were not for his illness, he could do better.=Were it not for his illness, he could do better.
如果不是因为他生病，他可以做得更好。
If he had money, he would buy that villa.= Had he money, he would buy that villa.
对将来情况的虚拟：
主句：主语＋would/should/might/could＋动词原形。
从句：should＋动词原形/were to＋动词原形。
对现在情况的虚拟：
主句：主语＋would/should/might/could＋动词原形
从句：动词过去式。
绛旓細3,if鏉′欢浠庡彞鏄痵hould do褰㈠紡,鍒欏悗闈㈢殑涓诲彞鍙互鐢ㄦ儏鎬佸姩璇嶅姞鍔ㄨ瘝鍘熷舰,涔熷彲浠ョ敤绁堜娇鍙ワ紙浣嗘敞鎰,绁堜娇鍙ヤ粎閫傜敤浜庡墠闈粠鍙ユ槸should do褰㈠紡鐨勶級渚嬶細If it should rain tomorrow,don't expect me./I would not go there.
绛旓細If he had come here yesterday, he would have seen his old friend.鍋囧浠栨槰澶╂潵杩欏効鐨勮瘽,灏变細鐪嬭浠栫殑鑰佹湅鍙嬨備笅闈㈡垜浠竴璧风湅鐪if鍦ㄦ潯浠剁姸璇粠鍙ヤ腑鐨勮櫄鎷熻姘銆1. 琛ㄧず涓庣幇鍦ㄤ簨瀹炵浉鍙嶇殑鎯呭喌銆傚叾鍙ュ瓙缁撴瀯涓:浠庡彞:if + 涓昏+ 鍔ㄨ瘝鐨勮繃鍘诲紡(be 鐢╳ere) + 鈥︹︿富鍙:涓昏+ would (should, could , might) ...
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绛旓細鐢if寮曞鐨鏉′欢鐘惰浠庡彞锛屾椂鎬佸簲璇ユ槸涓诲皢浠庣幇锛屽氨鏄涓诲彞鐢ㄤ竴鑸皢鏉ユ椂锛岃屼粠鍙ョ敤涓鑸幇鍦ㄦ椂琛ㄧず灏嗘潵銆備緥濡 If it doesn't rain tomorrow, I will visit my former school.杩欓噷浠庡彞灏辩敤涓鑸幇鍦ㄦ椂銆傚綋鐒秈f寮曞鐨勪粠鍙ヤ篃鍙互鐢铏氭嫙璇皵 渚嬪If I got up early in the morning, I wouldn't miss the...
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绛旓細1銆佷笌鐜板湪浜嬪疄鐩稿弽鐨勮櫄鎷 What would you do if you won the lottery?2銆佷笌杩囧幓浜嬪疄鐩稿弽鐨勮櫄鎷 If you had been here yesterday, you would have seen her.3銆佷笌灏嗘潵浜嬪疄鐩稿弽鐨勮櫄鎷 If it were to rain/should rain/rained tomorrow, our plan would be put off....
绛旓細if鏉′欢铏氭嫙璇皵濡備笅锛1銆佺幇鍦ㄦ椂:褰if寮曞鐨勮櫄鎷熻姘琛ㄧず涓庣幇鍦ㄤ簨瀹炵浉鍙嶆椂锛屼富鍙ヨ皳璇敤could銆亀ould銆乻houl d鎴杕i ght鍔犲姩璇嶅師褰紝鏉′欢浠庡彞涓殑璋撹鐢ㄨ繃鍘诲紡銆2銆佽繃鍘绘椂:褰搃f寮曞鐨勮櫄鎷熻姘旇〃绀轰笌杩囧幓浜嬪疄鐩稿弽鏃讹紝涓诲彞璋撹鐢╟ould銆亀ould銆乻houl d鎴杕i ght鍔爃ave鍐嶅姞鍔ㄨ瘝鍘熷舰锛3銆佸皢鏉ユ椂:褰搃f寮曞鐨勮櫄鎷...
