1、If it were Sunday tomorrow, I would go and see my friends. 明天要是星期天的話，我就去看望我的朋友。 If I were you, I should go and try. 我要是你，我就去試試。 If wishes were horses, beggars might ride. 如果幻想能成為馬匹，叫花子都有了坐騎 I would go if they treated me like a slave. 要是他們把我當奴隸對待，我就走。 If I had known your telephone number yesterday, I

2、 would have telephoned you. 如果昨天我知道你的電話號碼，我就給你打電話了。 If it had not rained this morning, I should have gone shopping. 今天早上要是沒下雨，我就去買東西了。 The flood might have caused great damages to the people if we had not built so many reservoirs. 倘若我們沒有修建這么多的水庫，洪水就會使人民遭受巨大的損失。 If he were here tomorrow, I would spea

3、k to him. 明天如果他在這里的話，我就和他談談。 If you dropped the glass, it would break. 你要是把杯子掉下來，會打碎的。 If she had time, she could help me. 她要是有時間，就會幫我了。 If I were to do the work, I should do it in a different way. 要是我做這項工作，我就會以不同的方式去做。 If the headmaster were to come, what would we say to him 假如校長來了，我們對他說什么呢？ Were i

4、t necessary, I might go without delay. 如果需要的話，我可以立即去。（= If it were necessary.） Had you taken my advice, you wouldn't have failed in the exam. 你要是聽了我的建議，就不會考試不及格了。（= If you had taken my advice.） Should I have time, I would call on her. 要是有時間，我就去看她。（= If I should have time.） If you hadn't watc

5、hed TV yesterday, you wouldn't be so sleepy now. 如果你昨天不看電視，你現(xiàn)在也就不會這么困了。（從句yesterday說明過去，主句now說明現(xiàn)在） If they had left home early this morning, they would arrive in half an hour. 如果他們今天一早就離開家的話，再過半小時他們就該到了。（從句說明過去，主句說明將來。） If you hesitated this moment, you might suffer in the future. 如果你此刻猶豫不決，你將來會

6、吃苦頭的。（從句說明現(xiàn)在，主句說明將來） He would not get such a result without your help. 沒有你的幫助，他就不會有今天的成果。(條件暗含在介詞短語without your help中) But for you, I could not be recovered so soon. 要不是有你，我就不會恢復得這么快。(條件暗含在But for you中) This same thing, happening in the past, would lead to a disaster.同樣的事，如發(fā)生在過去，就會釀成大禍。(條件暗含在分詞短語hap

7、pening in the past中) He must have been there, or he never could know the place so well.他一定是去過那兒，否則他絕不會對那個地方如此熟悉。(暗含條件是連詞or) She was ill, otherwise she would have been present at the meeting. 她病了，否則的話就會出席會議了。（條件通過連詞otherwise/or表示出來 If she had not been ill.） I told him to go there himself, but perhaps

8、 I should have gone together with him. 我讓他自己去那里，但也許我應該和他一道去。（連詞but暗示條件） Suppose you were in my shoes, what would you do 假若你站在我的立場上，你會怎么辦？（用suppose/supposing/providing等詞表示if） To talk with her, you would know she could not hear well.如果你同她交談，你就會知道她的聽力不好。（動詞不定式帶有假設的意思，相當于 If you should talk with her.） L

9、eft to himself, he could not have finished the work. 要是放任他的話，他是不可能完成工作的。（動詞的-ed形式表示條件 If he had been left to himself.） It is important that we (should) work out a study plan. 重要的是我們要制訂出一個學習計劃。 It will be better that we (should) meet some other time. 最好我們在另一個時間見面。 It is suggested that each student (s

10、hould) sing a song in English. 有人建議每個學生都要唱一首英文歌曲。 It is demanded that he should leave at once. 要求他立刻離開。 It is strange that he should have failed to see his own shortcomings. 真奇怪他竟看不到自己的缺點。 It is a pity/shame that I should be at school instead of lying here in hospital. 真可惜，我應當在學校而不是躺在醫(yī)院里。 It is natu

11、ral that you should forget it first. 你起先記不住是很自然的。 The examination instructor asked that the students (should) not use a calculator. 考官要求學生不要使用計算器。 The workers demanded that their wages (should) be raised by 10 percent. 工人們要求增加百分之十的工資。 They requested that he (should) sing a song. 他們要求他唱一首歌。 His silen

12、ce suggested that he agreed with my decision.他的沉默暗示他贊同我的決定。（暗示） He suggested that I (should) stick to my decision.他建議我堅持自己的決定。（建議） He insists that doing morning exercises does good to people's health. 他堅持認為做早操對健康有益。（強調(diào)） He insists that he (should) do morning exercises every day.他堅持每天都要做早操。（要求） I

13、 wish I were a bird. 但愿我是一只小鳥。 I wish I knew the answer.我要是知道答案就好了。 I wish she had taken my advice.那時她要是接受我的建議就好了。 I wish that I had seen her yesterday.真希望我昨天見過她。 I wish you would stay an hour longer. 我希望你再呆一個小時。 I wish it could stop raining.但愿雨能停。 The students hope that their football team will win

14、 the game. 學生們希望他們的足球隊獲勝。 （可能實現(xiàn)） I wish I could see him now. 我希望現(xiàn)在就能看到他。（不可能實現(xiàn)） My advice is that you (should) practise speaking English as often as possible.我的建議是你盡可能經(jīng)常地練習說英語。 The demand is that the composition (should) be written on one side only. 按照要求作文必須單面謄寫。 It is my desire that all the members

15、 of the family (should) gather once a year. 我的愿望是所有家庭成員一年團圓一次。 The suggestion that education (should) be reformed is reasonable.教育要改革的建議是合理的。 The teacher treats the pupil as if he were her own child. 這位老師對待這位學生就像自己的親生孩子一樣。（這位學生并不是她的親生孩子） I felt as though we had known each other for years. 我感覺我們好像認識多

16、年了。（其實并沒有認識多年） It looks as if it might rain. 天看上去好像要下雨。（不大可能下雨） He looks as if he is young. 看樣子他好像很年輕。（他就是年輕） He looks as if he were young. 看樣子他好像很年輕。（實際上他不年輕） Please remind me of it again tomorrow in case I (should) forget. 請你明天再提醒我這件事，以免我忘記。 She emphasized it again and again, lest he (should) forg

17、et. 她一再強調(diào)這一點免得他忘記。 We had a meeting and talked the matter over face to face for fear that there should be any misunderstanding. 我們開了一個會，面對面談了這件事，以免發(fā)生任何誤會. I shall write down your telephone number so that I may not forget. 我要把你的電話號碼記下來，以免忘記。 They worked harder than usual in order that they could fini

18、sh the work ahead of time. 為了能提前完成工作，他們比往常更加努力。 We will tell you the truth so that you can judge for yourself. 我把真實情況告訴你，使你能自己作出判斷。 Though he (should) fail, there would still be hope. 即使他失敗了，仍有一線希望。 I should say the same thing even if he were here. 即使他在這里，我還是要這么說。 Whether he (should) succeed or fail

19、, we shall have to do our part. 不管他成功還是失敗，我們還是要做好自己的事。 However hard it might rain rains, we shall go there together. 不管雨下得多么大，今晚我們還是要去那里。 No matter what his social position (might) be, a man is equal in the eye of the law. 一個人不論其社會地位如何，在法律面前都是平等的。 It is time that the children went to bed. 到孩子們睡覺的時間了

20、。 It is high time that we began the meeting. 正是我們開會的時間了。 If only he knew the answer. 他要是知道答案就好了。（用過去時表示現(xiàn)在） If only I could speak several foreign languages！我要是能講幾種外語就好了?。ㄓ脀ould/could表示將來） If only you had told me the truth before. 要是你以前告訴我真相就好了。（用過去完成時表示過去） If only I had known her earlier! 要是我早點兒認識她就好了！= I wish I had known her earlier. I would rather you left today. 我寧可你今天走。 I would prefer he didn't stay here too long. 我倒希望他不要在這兒呆得太久。 I would rather I hadn't seen that f