【正文】 mes a day and three pieces at a time． 這些藥每天服三次，每次服三粒。例如： Don’t speak all at once．One at a time, please． 不要同時一起說。 at a time則意為“一次”，表示一個時間單位。例如： In the 17th century much corn was grown in Tibet and Sichuan．At that time (＝At the 17th century) the land along the Changjiang River was being very crowded． at one time＝during a period of time in the past意為“過去有一段時期”，“曾經(jīng)”。例如： Were you in San Francisco at the time of the big earth quake in 1989﹖ 1989年舊金山發(fā)生地震時，你在那里嗎？ at that time 則通常指前文明確提到的某個時期、時候。 有時，at the time的后面可接“of．．．”短語。 at a time at the time通常用于過去時句子中，指某件事情發(fā)生的“當(dāng)時”、“那時”。 at that time。例如： In the beginning，some of us took no interest in physics． 起初我們有些人對物理不感興趣。例如： Students usually have a study plan at the beginning of term． 學(xué)生們在開學(xué)初制定學(xué)習(xí)計劃。例如： He assured me that it was true. We can’t ensure you a good post. My house is insured against fire． 2at the beginning；in the beginning at the beginning 在……初；在……開始的時候。 ensure的意思是“保證”，后面可以接雙賓語，也可以接that從句。 He will not tell the secret though he knows it．他雖然知道這個秘密，但他不會說出來。though引導(dǎo)的句子所說的是事實，even though引導(dǎo)的句子所說的則不一定是事實。 even though（＝even if），意為“即使”，引導(dǎo)讓步狀語從句。如： He spoke as though（as if）he had been here before．他說話的口氣好像他以前來過這里。 As far as the tourism of China is concerned, there is a long way to go． 就中國的旅游業(yè)而言，需要做的工作還很多。如： As far as I know, more than 10 million laidoff workers have found their new jobs． 就我所知，一千多萬下崗工人已經(jīng)找到了新的工作。 Black smoke rose from the chimney. He is too weak to raise that heavy box. Accidents usually arise from carelessness . A crisis has arisen in their marrige. Matt’s behavior was arousing the interest of the neighbors.2as (so) far as。 rise是一個不及物動詞，意思是“上升”，該詞是不及物動詞：rise, rose, risen raise是一個及物動詞，意思是“舉起”。 prove和approve詞形相似，prove是“證明”，“表明是”等。） （2）批準，通過。2approve, prove approve（1）贊成，同意。如：He quickly responded to the question. （他很快就回答了問題。如：He has replied to my letter.（他回答了我信中提的問題。 answer是常用詞，后可接letter（回信），question（回答問題），doorbell（開門），telephone（接電話），advertisement（應(yīng)征廣告）等。如：Our house is hidden among trees. between在兩者之間。例如： I believe you are on duty—even though you’re in plain clothes． 盡管你穿著便衣，我相信你是在值勤。 although只用來陳述“事實”，不能表示“假設(shè)”。例如： They said they would e。例如： Child as／though he is, he can speak two foreign languages． 雖然他是個孩子，但他會說兩門外語。例如： Young as／though he is, he knows a lot． 他雖然年紀不大，卻懂得很多。 as表示“盡管；雖然”，只能用于倒裝句，即：將表語、狀語或謂語動詞放在as之前。although與though?？苫Q。although用法較正式，語氣較強；though較常用；as則主要用于倒裝句。 though。如：We played the game all together. （我們大家都一起來玩游戲吧。如：Altogether there are six of us. （我們總計六人。如：He alone (Only he) can remember the story. （只有他才能記起這段經(jīng)歷。如：When she is left alone, she feels lonely. （剩下她一人時她就感到寂寞。如：Almost no one believed her. （幾乎沒人相信他。如：He is almost (nearly) smoking. （他幾乎每天抽煙。1almost, nearly 一般說來，almost比nearly 表示的意思更接近“開始”、“完成” （目標）等。 living可用于人或物，作定語時可前可后。 We agreed with what he said at the meeting． 我們同意他在會上講的話。 agree with作“同意某人的意見”解，其后可跟表示人的名詞或代詞，也可跟表示“意見”或“說的話”的名詞或從句。 其二是to作為介詞，之后跟表示“計劃／條件／建議等一類的名詞或代詞”。 agree to有兩層含義和用法： 其一是to作為動詞不定式符號，其后跟動詞原形，作“同意（答應(yīng)）做某事”解。1agree on；agree to；agree with agree on作“就……取得一致意見”解。 　　例如，I saw him ten minutes 。1ago, before ago表示以現(xiàn)在為起點的“以前”，常與一般過去時連用，不可以單獨使用。 afford一般只用于抽象事物。如Smoking affects health. effect效果，影響（名詞）。如：I get no personal benefit from the business.（我個人從這家企業(yè)中并不獲益。） profit 多指報償或報償性的收入。1advantage, benefit, profit advantage 常指一種使某人處于比其他人相對有利的地位，機會或時機。如：He adopted our suggestion.（他采納了我們的建議。如：Since they have no children of their own, they decided to adopt a little girl. （他們自己沒有孩子，所以決定收養(yǎng)一個小女孩。如：We require more help. （我們需要更多的幫助。如：acquire knowledge （獲得知識） inquire打聽，詢問。如：The police charged the driver with reckless driving. sue 常與for 搭配。 accuse, charge, sue accuse 指責(zé)，指控，常與of 搭配。它的反義詞是inexact。） correct“正確的”，指符合一定的標準或準則，含有“無錯誤的”意味。7accurate, correct, exact, precise accurate準確的，精確的。如：a traffic accident （交通事故） incident“附帶事件”，在政治上特指引起國際爭端或戰(zhàn)爭的事件，事變。如：I received an invitation yesterday, but I didn’t accept it. （昨天我收到了一個請柬，但并沒有接受邀請。如：The passengers are boarding the plane now. broad 為形容詞，寬廣的。如：I never went aboard a ship.abroad 副詞，在國外或海外。如： There are 25,000 Inuit in all．(＝In all, there are 25,000 Inuit．) 這兒共有25,000因努伊特人。 I was surprised at his ing at all．他竟然來了，我很驚訝。如： He doesn’t like you at all．他根本不喜歡你。 at all用于否定句時，意為“絲毫；根本”，用于疑問句時意為“究竟；到底”，用于條件句時，常譯為“當(dāng)真；實在”。 He is，after all，a small child．他畢竟還是個小孩子?？晌挥诰涫住⒕渲谢蚓淠Ｈ纾? But above all tell me quickly what I have to do．可首先快些告訴我該做什么。） above all；after all；at all。 petent 指“勝任”，“合格”，或受過專業(yè)技術(shù)等訓(xùn)練的，但不是超群的能力。如：A cat is able to see in the dark. （貓在黑暗中能看見東西。 例２：The teacher has the students _____ a position every other week. A. to write B. written C. writing D. write例３：While he was climbing the high mountain, he had his leg_____ A. broke B. break C. broken D. breaking 例４：There was so much noise that the speaker couldn’t make himself_____ A. hearing B. being told C. to hear D. heard 3)表示生理感覺的動詞如see, watch, notice, observe, hear后面接不定式做賓語補足語時，用省to的不定式。 例3：_____ the advice of his friends, he would not have suffered such a heavy loss in his business. A. If he took B. if he should takeC. Were he to take D. Had he taken 含蓄條件句中虛擬語氣的應(yīng)用 三級考試中經(jīng)常出現(xiàn)的三個句型： But for/without…，…… ……, otherwise/or… ……, but/though…. 例４：But for your help, I _____ the work in time. A. did not finish B. could not finish A. will not finish D. would not have finished 例５：Without electricity, human life _____ quite different today. A. is B. will be C. would have been D. would be 例６：He was very busy yesterday。 二、情態(tài)動詞 1. 幾個情態(tài)動詞的否定式的含義 can’t may not mustn’t need’t 2. 表示推測的幾個情態(tài)動詞用法 ★must表示肯定的推測，意思是“一定” +do 對現(xiàn)在情況的推測 must +have done 對過去情況的推測 例1：I ________ asleep in the corner, for