广州版七年级下册unit 2讲解.doc

知识点讲解1 on earth 在地球上 到底，究竟 Eg Why on earth did do that?2 be use for sth/doing sth 对于某事/做某事有用 Be useful to do sth做某事很有用3 be in danger 处于危险中4stop sb from doing sth 阻止某人做某事练习：1It is time _ A go to school B play games C to go home D to do my homeworks2 He often _supper at 6:00 in the evening. A have B has C is having D is eating3It is 6 oclock in the morning.He_ Aget up B gets up C is getting up D is getting up4We_ any Chinese classes on Friday. A dont have B arent having B are having D are have5Listen!The girl_in the room,She sings so beautifully. Asings B singing Cis singing Dare singsing6 The boy is _with his teacher.He looks very excited. A saying B speaking C talking D telling7Oh,What_in the next room.It is so noisy. A happens B is happening C happened D will happen语法点拨1.一般现在时的用法 1）表示经常性，习惯性的动作；表示现在的状态，特征 和真理。句中常用often, usually, every day等时间状语，例如：He goes to school every day. （经常性动作）He is very happy.（现在的状态）The earth moves around the sun. （真理）2）在时间状语从句和条件状语从句中，用现在时表示将来，例如：If you come this afternoon, well have a meeting.When I graduate, Ill go to the countryside.Dont get off the bus until it has stopped.3）有时这个时态表示按计划，规定要发生的动作。（句中都带有时间状语词）但仅限于少数动词，如：begin come, leave, go, arrive, start, stop, return, open, close等，例如：The meeting begins at seven.The train starts at nine in the morning.4）表示状态和感觉的动词。如be, like, hate, think, remember, find, sound等常用一般现在时。例如：I like English very much.The story sounds interesting.5）书报的标题，小说等情节介绍常用一般现在时。 2. 一般过去时的用法1）表示过去某时发生的事，存在的状态或过去反复发生的动作。He saw Mr.Wang yesterday.He worked in a factory in 1986.2）表示过去经常发生的动作，也可用“used to”和“would+动词原形”。例如：I used to smoke.During the vacation I would swim in the sea.注意：used to表示过去常发生而现在不发生的动作或 存在的状态。另外“be used to+名词（动名词）”表示 “习惯于 ”。例如：I am used to the climate here.He is used to swimming in winter.3. 一般将来时的用法一般将来时表示将来的动作或状态，其表达形式除了“will或shall+动词原形”外，还有以下几种形式。1）“to be going to+动词原形”, 表示即将发生的或最近打算进行的事。例如：It is going to rain.We are going to have a meeting today.2）go, come, start, move, sail, leave等可用进行时态表示按计划即将发生的动作。例如：Im leaving for Beijing.3)be to+动词原形”表示按计划要发生的事或征求对方意见。例如：Are we to go on with this work?The boy is to go to school tomorrow.4）“be about to+动词原形”表示即将发生的动作。例如：We are about to leave. 4. 现在进行时的用法1）现在进行时表示现在正在进行的动作，由“to be+现在分词”构成。例如：What are you doing?2）表示感觉，愿望和状态的某些动词，如have, be, hear, see, like等词一般不用进行时。5. 过去进行时的用法 1）过去进行时表示过去某一时刻，某一阶段正进行的动作，由“was (were)+现在分词”构成。例如：In 1980 he was studying in a university.He was reading a novel when I came in.练习 选择最佳答案填空：1.We _ a party next weekend. I hope you can come.A. have B. will have C. had D. would have2. I _ a book at home when I heard a loud noise outside the building.A. have read B. was reading C. read D. had read3. - _ my glasses?- Yes, I saw them on your bed a minute ago.A. Do you see B. Had you seenC. Would you see D. Have you seen4. Helen _ her key in the office so she had to wait until her husband _ home.A. had left; comes B. left; had comeC. had left; came D. had left; would come5. Hi, Tracy, you look tired.- I am tired. I _ the living room all day.A. painted B. had painted C. have been painting D. have painted 6. You have left the light on.- Oh, so I have. _ and turn it off.A. Ill go B. Ive gone C. I go D. Im going7. The reporter said that the UFO _ east to west when he saw it.A. was traveling B. traveled C. had been traveling D. was to travel 8. I _ ping-pong quite well, but I havent had time to play since the new year.A. will play B. have played C. played D. play9. You havent said a word about my new coat, Brenda. Do you like it?- Im sorry I _ anything about it sooner. I certainly think its pretty on you.A. wasnt saying B. dont say C. wont D. didnt say10. I wonder why Jenny _ us recently. We should have heard from her by now.A. hasnt written B. doesnt write C. wont write D. hadnt write作文练