1)概念:表示过去某时正在进行的状态或动作。
2)过去进行时的主要用法是描述一件事发生的背景;一个长动作延续的时候,另一个短动作发生。
3) 常用的时间状语有this morning, the whole morning, all day yesterday, from nine to ten last evening, when, while等。例如:My brother fell while he was riding his bicycle and hurt himself. 我兄弟骑车时摔了下来,受了伤。It was raining when they left the station. 他们离开车站时,正下着雨。When I got to the top of the mountain, the sun was shining. 我到达山顶时,阳光灿烂。
典型例题
1) Mary ___ a dress when she cut her finger.
A. made B. is making C. was making D. makes
答案C. 割伤手指是已发生的事情,应用过去时。同时,when表时间的同时性,"玛丽在做衣服时"提供事情发生的背景,因此用过去进行时。
2) As she ___ the newspaper, Granny ___ asleep.
A. read;was falling B. was reading; fell C. was reading; was falling D. read;fell
答案B.句中的as = when, while,意为"当……之时"。描述一件事发生的背景时,用过去进行;一个长动作发生的时候,另一个短动作发生。句意为 "在她看报纸时,奶奶睡着了。"句中的 fell(fall的过去时),是系动词,后跟形容词,如:fall sick。