【正文】
ing ________(begin) at 9 o’clock this morning.(1) 概念:過去某個時間里發(fā)生的動作或狀態(tài);過去習(xí)慣性、經(jīng)常性的動作、行為。t,如主語為第三人稱單數(shù),則用doesn39。例:The next train leaves at 3 o39。)②客觀事實和普遍真理。.. . . .. 時態(tài)1. 一般現(xiàn)在時(1) 概念:經(jīng)常、反復(fù)發(fā)生的動作或行為及現(xiàn)在的某種狀況。例:The sun rises in the east.(太陽從東方升起。clock this afternoon.(下一趟火車今天下午3點開車。t,同時還原行為動詞。(2) 基本結(jié)構(gòu):含有be動詞,主語+was/were+...... 不含有be動詞,主語+動詞過去式+......(3) 時間狀語:ago, yesterday, the day before yesterday, last week(year, night, month…), in 1989, just now, at the age of 5, one day, long long ago, once upon a time, etc.(4) 用法:①表示過去某個時間發(fā)生的動作或情況。)特殊用法:由would/ used to do表達(dá)的句型,本身表示的就是過去時,意為過去常常。例:I wanted to ask you if I could borrow your car?(我想向您借車用一用,可以嗎?) Would you mind my sitting here?(您介意我坐在這里嗎?)(5)否定形式:帶be:主語+was/were not+動詞原形+...... 不帶be:主語+didn39。例:She is now teaching in a middle school. (她現(xiàn)在在一所初中教書。練習(xí)(exercises):1. Hurry up! We __________(wait) for you. (快點!我們在等你。例:When I came home yesterday, they were having dinner.(昨晚我回家的時候他們在吃晚飯。練習(xí)(exercises):1. Mary __________(do) her homework at 7 . yesterday.2. She __________(clean) the house the whole afternoon yesterday. (她昨天整個下午都在打掃房子。)②表示發(fā)生在過