【正文】 Please tell him to ring me if you see him.如果你不能來(lái)，請(qǐng)告訴我一聲。If it’s fine tomorrow, we can/may go out.(3) 主句還可以用祈使語(yǔ)氣等表示請(qǐng)求、建議等：. 明天如果下雨就呆在家里。如果覺(jué)得其“肯定”程度達(dá)不到使用will的程度，或者如果想表達(dá)建議等其他意思，就可以用別的情態(tài)助動(dòng)詞來(lái)代替will：. 我替你將這些信發(fā)了好嗎？Shall I post these letters for you?如果你愿意，你可以把它們寄走。I’m sure he will buy them, but if he doesn’t, I’ll buy them myself.如果她正在睡覺(jué)，那就別叫醒她。If I do, I’ll buy a new one.如果他不買那些畫，你怎么辦？ What will you do if he doesn’t buy those pictures?我敢肯定他會(huì)買的。如果我們認(rèn)為將來(lái)的事件很可能會(huì)發(fā)生，那么if從句中要用一般現(xiàn)在時(shí)(有時(shí)也用其他形式的現(xiàn)在時(shí))，主句中用will(或shall) 加動(dòng)詞形式或其他形式的將來(lái)時(shí)：. 你若是不小心，就會(huì)打碎花瓶的。如果then沒(méi)有道出，也會(huì)隱含在句子的意思內(nèi)。Most people obey the law...Grammar in use 條件句 (Conditional sentences)(1) 條件指某一事情完成之后其他事情才能發(fā)生。 vt. to do what you are told or expected to do服從；遵守；順從opposite: disobey. vt. 服從指揮/命令 to obey a mand/ an order 遵守規(guī)章/法律 to obey rules/the law 他對(duì)父母一向絕對(duì)服從。I want you here by two o’clock without fail.2. always 總是；必定 . 他每周必定寫信。Her eyesight is failing.6. [v] to be unable to continue倒閉；破產(chǎn)：. 經(jīng)濟(jì)衰退期間有幾家銀行倒閉了。He never fails to every week.4. [v] to stop working 出故障；失靈. 我騎自行車下山到中途剎車失靈了。He felt he would be failing in his duty if he did not report it. [v to inf] 他未履約。 to decide that sb. / sth. has not passed a test or an exam不及格，. 他駕駛執(zhí)照考試不及格。 I failed in my attempt to persuade her. (2) 她未能進(jìn)入藝術(shù)學(xué)院。又如：. 你一定不要拒絕我。雙重否定用來(lái)表示肯定。That smell reminds me of France.6. If you receive a request like this, you cannot fail to obey it! 如果你收到這樣的懇求，你是不會(huì)不遵照?qǐng)?zhí)行的！1) fail和refuse, forget等相似，是具有否定意義的動(dòng)詞。 Passengers are reminded (that) no smoking is allowed on this train. [vn wh] 誰(shuí)能告訴我下一步該做什么？Can someone remind me what I should do next?. remind sb. of sb./sth. 使想起(類似的人、地方、事物等)：. 你說(shuō)這樣的話，使我想起了你的父親。提醒我一下好嗎？ I’m sorry, I’ve forgotten your name. Can you remind me? [vn to inf] 提醒我在出去之前給瑪麗打電話。The photographs are a lasting reminder of life in the 1920s.(lasting adj. [ubn] 繼續(xù)存在的；持久的；耐久的)2. a letter or note informing sb. that they have not done sth. (告知該做某事的)通知單，提示信. 他還沒(méi)有付賬，我們最好寄給他一封催款信。You must sign guests out when they leave the club.4. sign sth. over (to sb.) to give your rights or property to sb. else by signing a document簽字轉(zhuǎn)讓(權(quán)利或財(cái)產(chǎn)). 她簽署了轉(zhuǎn)讓手續(xù)，把房子過(guò)到女兒名下。He signed away his share in the property.3. sign in/out // sign sb. in/out to write your/sb.’s name when you arrive at or leave an office, a club, etc. 簽到/退；替…簽到/簽退. 來(lái)客均需簽到。She learnt to sign to help her deaf child.. 1. sign for sth. to sign a document to show that you have received sth. 簽收. 有人已經(jīng)簽收了這個(gè)包裹。The hotel manager signed to the porter to pick up my case.(porter [?p?:t?] n. 1. 行李員；搬運(yùn)工 2.(醫(yī)院里護(hù)送病人的)護(hù)工 3. 門衛(wèi))(pick sth. up 拿起；舉起；提起 )4. to use sign language to municate with ：. [vn] 現(xiàn)在越來(lái)越多的戲劇配上了手勢(shì)語(yǔ)。The band signed with Virgin Records.(virgin adj. 1.[ubn] 未開發(fā)的；原始狀態(tài)的；天然的；未改變的；未觸動(dòng)的2. [obn] 處女的；貞潔的；童貞的) [vn]這個(gè)公司最近和一名新演員簽約。You haven’t signed the letter. 在協(xié)議/合同/支票上簽字 to sign a deal/contract/cheque (AmE check)2. to arrange for sb., for example a sports player or musician, to sign a contract agreeing to work for your pany。d?enjuin] adj. 1. 真的；名副其實(shí)的 ；誠(chéng)實(shí)的；可信賴的) 簽(名)，署(名)；簽字，簽署 . [v] 請(qǐng)?jiān)谶@里簽名。zent] sth. esp. in mathematics 符號(hào)；記號(hào). 加/減號(hào) a plus [pl?s] /minus [39。The sign on the wall said ‘Now wash your hands’.3. [c] a movement or sound that you make to tell sb. (或聲音)；手勢(shì). 她點(diǎn)頭示意我們坐下。告示牌。標(biāo)牌。There is no sign of John anywhere.她的工作出現(xiàn)了一些改進(jìn)的跡象。kei??n] n. [c, u] ~(of sth/of doing sth / ~( that…) 表明；標(biāo)示；顯示；象征). 頭疼可能是緊張的跡象。?ɡl] n. 三角形)這個(gè)房間面積是12平方米。You will notice that your baby has two soft areas on the top of his head.4. [c] ~(of sth.) a particular subject or activity, or an aspect of it 領(lǐng)域；方面：. 健身俱樂(lè)部是近年來(lái)發(fā)展迅速的領(lǐng)域。農(nóng)村的 urban [??:b?n] adj. 城市的；城鎮(zhèn)的；都市的)60年前有一半法國(guó)人仍然生活在鄉(xiāng)村地區(qū)。They are very welltodo.3) area [???ri?] n. 1. [c] part of a place, town, etc., or a region of a country or the world(地方、城市、國(guó)家、世界的)地區(qū)，地域 . 荒漠地區(qū) desert [?dez?t] areas 農(nóng)村/城市地區(qū) rural/urban areas 內(nèi)城區(qū) innercity areas(rural [?ru?r?l] adj. 鄉(xiāng)下的。welltodo adj. having a lot of money。This has not been a notably successful project.2) No Parking原來(lái)是交通標(biāo)牌上的一句話，在句中作area的定語(yǔ)。 The house had many drawbacks, most notably its location ([l?u?kei??n] n. 位置；場(chǎng)所) and price.(drawback [?dr?:b230。歡迎會(huì)。 Many notables attended the reception [ri?sep??n]. (n. 1. 接待,接見。n?ut?bl] adj. ~(for sth) 值得注意的；顯著的；重要