Unit4Grammar课件2023—2024学年牛津译林版九年级英语上册

Unit 4 Growing up Grammar Talk about Spud Web 1.When did he try out for the school team? While attending junior high. 2.When did he score 20 points in his first game? When he finally got the chance. at or during a certain time during a certain time While attending junior high. he was A Using before,after,when and while when 当...时 主过从过 1.一个动作发生的时候（短动作，即非延续性动词），另一个动作正在进行（长动作，即延续性动词） When the teacher came into the classroom, we were reading English. when后谓语动词可以是延续性动词（过去进行时）也可以是非延续动词（一般过去时）。 2.当某一动作正在进行（长动作），另一动作发生了（短动作） When we were watching TV, the telephone rang. 主将从现 3. 当主句用一般将来时，when从句用一般现在时 When he grows up , he is going to be a doctor . Learn and practise 1.When she (come) into my room,I (read) a book. 2.When we (dance),a stranger (come) in. 3.I (telephone) a friend when Bob (come) in. 4.I (tell) him about it when he comes. 注意： when引导的从句既可放在句首，也可放在句中。 came was reading were dancing came was telephoning came will tell while 在...期间 主过从过 1.表示主句动作（短动词）发生在从句进行的过程中（长动词） While we were having a meeting,Li Ming came in. when后谓语动词只能是延续性动词（过去进行时） 2.强调主句动作（长动词）和从句动作（长动词）是同时发生的 Some students were reading while others were writing. 1.While my sister the floor, I the dishes. 2.While the boys football, it (rain). 3.My brother (fall) while he (ride) his bicycle and hurt himself. 4. I was in Beijing, I visited a lot of places. was sweeping were playing fell 想一想：哪个句子里面的while可以换成when呢？ 注意： while 后面还可以跟表示状态的词。while引导的从句既可放在句首，也可放在句中。 was washing rained was riding While 【拓展】在含有when和while引导的主从复合句中，当主句和从句的主语一致，并且从句中有be动词时，可以省略主语和be动词，构成when/ while + -ing结构/介词短语。 1.When she was in trouble, she asked for my help. 2.While I was travelling, I usually bought some presents. My brother fe