九大时态详解_过去进行时

五过去进行时定义：表示过去某个时间点正在发生的事情句型结构：主语+谓语动词+（宾语）谓语动词：was/were +doing (动词ing形式)*注意：进行时态的中出现的动词必须是持续性动词，而非短暂性动词。动词ing形式的变化规则：1. 在词尾+ing，如playplaying；2. 当动词以重读闭音节结尾且结尾只有一个辅音的时候，双写末尾的辅音+ing，如runrunning；3. 当动词以辅音+e结尾时，去e+ing，如makemaking4. 不规则变化： lielying diedying例1：We were having breakfast at 8:00 this morning.例2: I was cleaning my bedroom at 7:00 last evening.例3: Mary was waiting for the school bus then.例4: You were listening to music when I saw you.句型转换：变为否定句：We were having breakfast at 8:00 this morning. (在be动词之后加not) werent变为一般疑问句：Were you having breakfast at 8:00 this morning? (把be动词提到句子最前面，其它不变)回答： Yes, we were. No, we werent.特殊疑问句的变化规则：三步走，一换二代三提前例1：We were having breakfast at 8:00 this morning.(对划线部分提问)一换：换成一般疑问句 Were you having breakfast at 8:00 this morning?二代：把划线部分用特殊疑问词代入 Were you having breakfast at 8:00 this morning? doing what三提前：把特殊疑问词提前 What were you doing at 8:00 this morning?拓展提高：由when引导的时间状语从句，从句用一般过去时，主句用过去进行时You were listening to music when I saw you. 主句：过去进行时 引导词 从句：一般过去时 注意：当when引导的从句与主句交换位置时，句子 意思不变，如You were listening to music when I saw you.=When I saw you, you were listening to music. She was reading a book when her mother came back home.=When her mother came back home, she was reading a book. 由while引导的时间状语从句，主句和从句都用过去进行时I was doing my homework while my dad was watching TV last.主句：过去进行时 引导词 从句：过去进行时=While my dad was watching TV, I was doing my homework.Linda was cleaning her bedroom while her brother was playing outside.=While her brother was playing outside, Linda was cleaning her bedroom.注意：从句要紧跟着引导词。练习一：请写出例 2、3、4的否定句，一般疑问句及其问答。练习二：请把下列句子改成特殊疑问句(写出变化步骤)1. The students were watching TV at home last night. 练习三：用适当的引导词，把下列句子连成一句话1. A. Martin was watering the flowers. B. Linda came in.2. A. Cindy and Lucy were studying English.