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1、Unit 12 词汇篇 _第十二单元重点单词和句型词语解析：1.unexpected用作形容词，意为“出乎意料的；始料不及的”。是由形容词expected(意料的)加前缀un构成。2.oversleepoversleep是动词，意为“睡过头；睡得太久”，是合成词，由over(超过)+sleep (睡觉)构成，其过去式和过去分词都是overslept。3.by the time(1)by the time意为“不迟于；在之前”，相当于not later than (a time) 或before，可用于一般将来时或者过去完成时。(2) by the time意为“到时为止；到时”，注重时间的截止
2、。4.What happened?发生了什么事？happen指偶然的、没有预料的“发生”，其结果往往给人带来不幸或麻烦。【拓展】(1) happen to sb./sth.指某人或某物发生什么事。(2)happen to do sth.表示“碰巧做某事”。(3)It happened that意为“碰巧”。5.give sb.a lift 该短语意为“捎某人一程”，书面语。与give sb.a ride意思相同，只不过该短语常用于口语中。6.discovery discovery用作名词，意为“发现；发觉”。其动词形式为discover，意为“发现”。7.marrymarry作及物动词，意为“
3、嫁、娶；与结婚”。其常用法有：(1)marry sb.意为“和某人结婚；嫁给某人”。(2)marryto意为“将嫁给”。【拓展】get married 结婚； be/get married to 和结婚【注意】marry和get married都是终止性动词，不能与表示一段时间的状语连用，如果表示结婚一段时间，应该用be married。8.cancel cancel用作动词，意为“取消；终止”。其过去式和过去分词可以是canceled，也可以是cancelled。9.believable believable作形容词，意为“可相信的；可信任的”。其动词形式为believe，意为“相信”；其反
4、义词为unbelievable意为“难以置信的”。10.disappear disappear用作动词，意为“消失；不见”。其反义词为appear，意为“出现”。11.Many April Fools jokes may end up being not very funny.许多愚人节玩笑的结局并非十分好玩。 end up意为“结束；以告终”，后接介词或动名词。12.fool(1)作名词，意为“白痴；傻瓜”。(2)作动词，意为“欺骗；愚弄”。【拓展】其形容词形式为foolish，意为“傻的；愚蠢的”。13.invite的用法invite作及物动词，其用法主要有：(1)invite sb.to
5、 sth.意为“邀请某人去”。(2)invite sb.to do sth.意为“邀请某人做某事”。(3)invite sb.to some place意为“邀请某人去某地”。【拓展】invitationn.邀请14.辨析embarrassing与embarrassed(1)embarrassing意为“使人尴尬的；令人为难的”，主语一般指物。(2)embarrassed意为“窘迫的；害羞的”，主语一般是人。15.get dressed get dressed意为“穿衣”，由get+dressed这一过去分词构成，类似的用法还有：get lost“迷路”；get caught in the r
6、ain“困在雨中”等。【拓展】get dressed in+颜色/衣服；dress sb.意为“给某人穿衣服”。16.costume party该短语意为“化装舞会”17.be about to do sth.be about to do sth.是一种表示将来的结构，这种结构表现为“眼前的；眼下的”将来，即很快、马上就要发生，不能与时间状语连用。【链接】be going to do sth.也是将来时的一种结构，但其表示“即将；打算”做什么，其后可以与时间状语连用。18.We stared in disbelief at the black smoke rising above the bu
7、rning building.我们直愣愣地盯着燃烧着的大楼上升起的黑烟，无法相信。(1)stare表示“(目不转睛地)盯着瞧；凝视”的意思，是不及物动词，当接宾语时需要用介词at来引入所注视的内容。(2)介词短语in disbelief用来表示人们持有怀疑、疑虑的态度，常与stare at sb.,shake ones head等搭配使用。(3)on,over,above的辨析三个词都表示“在上”的意思。其区别是：on表示“在上面”，物体与物体之间互相接触。over强调垂直的正上方。above表示“在上方”，只表示在某物上的高低位置，且互不接触。19.till既可以用作连词，又可以用作介词，表
8、示“到；直到”谓语动作或状态延续的时间终点。因为，肯定句中的谓语必须是延续性动词。若主句是瞬间动词，则主句的动词要用否定形式，或含有否定意义的词，意为“直到才”。重点句式1. By the time I got up, my brother had already gotten in the shower.当我起床时，我哥哥已经进了浴室了。2. By the time I got outside, the bus had already gone. 当我出来时，公汽已经走了。3. When I got to school, I realized I had left my backpack a
9、t home.当我到达学校时，我才意识到我把背包忘在家里了。4. By the time I walked into class, the teacher had started teaching already.当我走进教室时，老师已经开始讲课了。5. By the time I arrived at the party, everyone else had already showed up.当我到达晚会时， 其他的每个人都已经到了。6. When he put the noodles into the bowl, he realized he had forgotten to add t
10、he green beans.当他把面条放进碗里时，他意识到他忘了添加绿豆荚了。7. Before she got a chance to say goodbye, he had gone into the building. 在她得到一个向他告别的机会之前，他已经进入楼房了。1.It was such an _joke that everyone felt really .A. embarrassing; embarrassed B. embarrassed; embarrassingC. embarrassed; embarrassed D. embarrassing; embarrass
11、ing2.Emilys new books are very popular.They were _in an hour.A.sold out B.showed up C.put off D.took out3.Will you take part in the football game on Sunday afternoon?Yes,but it has been _because of the rain.A.refused B.controlled C.cancelled D.served4.Look!What is over there?It may be a plane flying
12、_the sky.A. at B.over C.above D.in5.My aunt always hopes to _a doctor.A.marry B.marry to C.be married D.get married解析：1. B. Embarrassed尴尬地; embarrassing令人尴尬的2. A.sell out 卖光，show up 炫耀，put off推迟 took out取出3. C.cancell 取消，refuse拒绝,control控制,serve服务4. D.辨别介词 in,in the sky5. A.marry sb/get married to s
13、b 嫁娶sb 基础演练I.用方框内所给单词的适当形式填空。invite, embarrassed, fool, costume, happen1.I felt like a _when I realized my mistake.2.Mary wears a beautiful _at the party.3.Last Sunday my friend _me to her birthday party.4.Lets go and see what is _over there.5.I was very _at the party because I wore the wrong clothe
14、s.II.根据汉语提示完成英语句子，每空一词。1.I left for the train station when my alarm clock_ _ (发出响声).2.Dont _ _ (熬夜) too late, or you will feel tired in class.3.Mike didnt _ _ (露面) until 2:00 in the afternoon.4.The _ _ (化装舞会) was exciting. Everyone had a lot of fun.5.After Jack _ _ (穿上衣服),he went out with a camera.III.词汇运用。A)根据句意及首字母提示写出正确的单词。1.I ate two delicious apple p_at Tonys home yesterday.2.Look!Th
