Grammar A &B,(Three minutes before English class),show time,Spud Webb was the shortest player in the NBA. _ attending junior high, Spud tried out for the school team . But he was refused because of his height . _ he finally got the chance, he scored 20 points in his first game. _ he graduated from university, he was forced to play in another basketball league .And he remained there for about a year _ the NBA took notice of him . Spud didnt give up _ his dream came true .,While,When,After,before,until,Fill in the blanks with the correct words.,Grammar A (Using before ,after, when &while),Before he was born, many people believed that he would be a basketball star.,2.08m &1.88m,After he took some basketball training, he showed his talent(才能) in the game.,Before means earlier than a certain time.,Tip1 :,After means later than a certain time.,Tip2 :,3.You should turn off the lights _ you leave the room. = You should turn off the lights _ _ the room. 4. Tom went to school _ he finished his breakfast. = Tom went to school _ _ his breakfast.,before,before leaving,after finishing,after,1. You cant watch TV_ you finish your homework. (2013 泰州) A. after B. if C. when D. before 2.You should hand in your test paper _ you check it . (2014 常州) A. while B. when C. before D. after,Grammar A (Using before ,after, when &while),While/When he was attending junior high, he joined the Shanghai Youth Team.,九岁,When he was 9, he began to take basketball training.,when means at a certain time.（在某个特定的时间点）,Tip3 :,When/While mean during a certain time.( 在特定的时间期间),Tip4 :,1. _ the children were playing football ,it began to rain. (2014 无锡) A. After B. If C. While D. Once 2. _ I got back, my mother was cooking for me. (2013 宿迁) A. When B. Before C. Since D. Although,3. While _, he received a call from his mum.（2013 苏州） A. watched TV B. he was watching TV C. he watched TV D. he is watching TV,当主句的主语和从句的主语一致且从句中有be动词时，可省略从句的主语和be动词。,While _ TV, he received a call from his mum.,watching,Finish Part A: Combine the sentences using before, after, when or while. (P54),1. I go jogging every morning. Then I have breakfast. 2. I practised playing basketball for hours. I felt tired out.,I go jogging every morning before I have breakfast.,After I practised playing basketball for hours, I felt tired out.,3. I met Peter. I was waiting at the bus stop. 4. I was watching TV. I received a call from my uncle. 5. I was ready to go to bed. My father came back from work.,I met Peter while/when I was waiting at the bus stop.,While/when I was watching TV, I received a call from my uncle.,I was ready to go to bed when my father came back from work.,1. Demands(要求): Make sentences with the conjunctions before ,after, when &while.,2. Rules: 1) Time ：only one minute. 2)Stand up quickly and make sentences one by one. 3) The more, the better.,10 20 30 40 50 60,When Yao Ming was 18 years old, he joined the national basketball team.,Since he joined it, he has won many competitions.,since在一般情况下，从句的谓语动词用一般过去时，而主句的谓语动词用现在完成时。,Grammar B (Using since, till, &until),Tip5 :,Since means from a certain time.,He did not get the chance to be world-famous until he joined the NBA.,He practiced playing basketball very hard until/till 2011. Then he ended his basketball career(事业).,Grammar B (Using since, till, &until),Tip6 :,1.Until and till mean up to a certain time. 2.Until can be placed or the sentence, but till is usually used the sentence.,at the beginning,in the middle of,in the middle of,中考链接,1. Have you been in Nanjing for a long time? Yeah. _ my parents came here. (2014 南京) A. For B. As C. When D. Since 2. Tigers wait _ it is dark, then go out to find their food. (2012徐州) A. since B. until C. as D. because I _go to bed _ I finished my homework last night. A. /, until B. not , until C. didnt, until D. /, till,until在肯定句中，主句的谓语动词通常是_动词。 until在否定句中，主句的谓语动词通常是_动词。,延续性,短暂性,B1.Practise: Fill in the blanks with since, till or until.,1.I have been crazy about playing basketball_ I was a little boy. 2.The weather has been awful this week. The rain did not stop_ yesterday evening. 3.We played basketball in the playground this afternoon_ it was getting dark. 4.It is the first time we have played basketball _Monday. We enjoyed ourselves very much. 5.I waited for 20 minutes at the bus stop_ the bus arrived. 6.It is Friday evening. I will not go to bed_ I finish watching my favourite TV programme.,since,until,until/till,since,until/till,until,Finish Part B: Complete the sentences using since, till, or until. (P55),Tip : When we use the structure not until , we _(can, cant) use till instead of until.,