八年级英语whatwereyoudoingwhentheufoarrived1探讨.ppt

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Summary: 过去进行时的构成： 1.概念:表示过去某个时刻或过去一段时间正在进行的动作. 2.公式:主语+was/were+doing sth +时间状语 3.指示词: at that time, at nine, when someone did sth.等连用 , ??2. 现在分词的构成 ????4）以字母y结尾的单词，直接加ing。 ????如carrying、playing、studying。 ????5）以字母ie结尾的动词，变ie为y，再加ing。 ????die→dying???????????? lie→lying ????6）以元音字母加e结尾，或以e结尾，且e发音的动词，直接加- ing 。 ????see - seeing????????????be - being 1. I ___________ (cook) dinner when my daughter came back home yesterday. 2. Look! A cat ___________ (climb) up the tree. 3. John ______ (walk) to school every day. was cooking is climbing walks 二、用所给动词的适当形式填空。 4. John was climbing the tree when a man _____ (see) him. 5. I ___________________ (be) a teacher in five years. 6. John can ________ (draw) a horse very well. saw will be draw /am going to be 课堂练习 二. 用when，while填空 1. __________ the alien was in the museum , I called the police . 2. The boy was walking down the street __________ a UFO landed . 3. __________ the alien was visiting the museum , the boy called the TV station . 4. I was cleaning my room ________ the fire broke out . 5. __________ Linda was shouting his name , some people looked at her . 6. __________ Linda finally saw Davy , he was jumping with a dog . While when While when While When “when” or “while” when可指时间点，又可指时间段，从句中可用延续性动词，也可用非延续性动词，常跟一般过去时 When the UFO took off, the boy was taking photos while 总是指一个时间段，从句中必须用延续性动词。常跟过去进行时 While the boy was taking photos, the UFO took off, 延续性动词表示的动作不但可以延续，而且可以产生持久的影响。 非延续性动词指表示行为瞬时间完成的动词,以及表示“变得”意义的联系动词 have live read sing sleep stand stay wait walk watch put begin open borrow return leave become arrive buy stop 1.—What_____ you______（do）when the UFO ________ (arrive)? —I_____________（make）a cake in the kitchen. 2.When the door bell rang，Jim___________（sleep）in the bedroom. 3.The girl____________（shop）when she _________ (see) the alien get out of the UFO. 4. The boys ______________