Unit5When和while语法详解课件2021-2022学年人教版英语八年级下册

初中语法详解 When和While的用法 1.(用作疑问副词) 什么时候,何时? 一:when的用法 When did you last see Margaret? 你上一次见到玛格丽特是什么时候? 2.(when引导时间状语从句) 当...时 When my mother came home, I was watching TV. 当我妈妈到家的时候,我正在看电视。 学习when引导的状语从句(when+一般现在时) 1.当他来时,我们就开始开会。 When he comes , we will start the meeting. 2.当你生病时,你必须看医生。 When you are ill , you must see a doctor. 3. 当你过马路时请当心。 Be careful when you cross the street. 学习when引导的状语从句 (过去时) 1.当他打开门时,他看到了这只鸟。 When he opened the door, he saw the bird. He saw the bird when he opened the door. When 引导的时间状语从句,译为“当……的时候” 从句 主句 主句 从句 学习when引导的状语从句(过去时) 1.当她六岁时,她会下棋。 When she was six years old, she could play chess. She could play chess when she was six years old 从句 主句 主句 从句 Let's practise He yelled at me. I got anry. When he yelled at me, I got angry. I got angry when he yelled at me. Let's practise John answered the phone. A women said,” Hello, darling.” When John answered the phone, a women said,” Hello, darling.” A women said,” Hello, darling.” when John answered the phone. Let's practise He exercises. He feels great. When he exercises , he feels great. He feels great when he exercises. Let's practise She is sad. She cries. When she is sad, she cries. She cries when she is sad. 学习when引导的状语从句(过去时+过去进行时) 1.当电话响的时候,我的弟弟正在写作业。 When the telephone rang , my brother was doing homework. =My brother was doing homework when the telephone rang. 2. 当一个陌生人进来的时候,我们正在跳舞。 We were dancing when a stranger came in. = When a stranger came in we were dancing. Let's fill in 1 I was studying social science _ my brother turned off the light. 2 _ our teacher arrived, we were taking a nap. 3 when I _ (wake) up, I was sleeping on the floor. 4 He was reading a book when the telephone _ (ring). when引导的状语从句总结 When + 一般现在时, 一般现在时. 祈使句 情态动词 将来时 When + V2 , V2. When + V2, was/were Ving. Let's choose 1.I _ a meal when you _ me. a. cooked, were ringing b. was cooking, rang c. was cooking, were ringing d. cooked, rang 2.What book _ you _ when I _ you at four yesterday afternoon? a. did, read, was