英语人教版八年级下册conjunctions when and while

Unit 5 What were you doing when the rainstorm came?Teaching aims1. To learn speak the sentences in Grammar Focus.2. To learn how to use the past progressive tense.3. To learn how to use “when” and “while”Language points and focus1. 要求熟读及掌握的句型：a) What were you doing at eight last night?I was b) What was she doing at the time of the rainstorm?She was c) What were you doing when the rainstorm came? I was.d) What were you doing while Linda was sleeping? I was.2. 语法点（2点）：1) 过去进行时：was/were + V-ing.2) 由while 和 when 引导的时间状语从句。Difficulties1) 过去进行时的用法。2) when与while的区别。Teaching aidsMultimedia, computer, blackboard.Teaching stepsStep 1 Greeting (ppt1 & ppt2)S: Good morning, everyone!T: Good morning, Miss Tang!S: Today we are going to continue to learn unit 5. Section A Grammar Focus to 4c. Now turn to page 36, Ok?T: Ok.Step 2 warm up & revision(ppt3 & ppt4)Revision: T: Before our lesson today, lets read words together and try your best to remember all of it.T: are you ready?S: Yes, ready!T: storm (go)S: storm, storm 暴风雨 stormT: OK, very good. Do a good job. Try your best to learn all of those words and tomorrow we are to make a dictation.S: Yes, we do.Step 3 Presentation (ppt5)T: look at the ppt, now read loudly those words as usual. If I ask you those question sentences, you read the answer sentences. If you read the question sentences, then Ill give the answer sentences.Are you ready?S: Yes, we are ready.T: What were you doing at eight last night?S: I was taking a shower. I was taking a shower.T: S: S: What were you doing at eight last night? What were you doing at eight last night?T: I was taking a shower.S: T: Step 4 grammar 1 (ppt6)T: Ok, you are not so familiar with those sentences; you should do more exercise after class. Now you should according to the highlight to find the grammar in these sentences.【展示ppt上的红色重点was(were) doing/taking/reading/helping/sleeping】T: tell me the grammar about those expressionsS: 过去进行时 （The past progressive tense）T: Yes, you are right. The first grammar is the past progressive tense.T: 首先我们讲一讲它的构成形式：was/were+ v-ing(板书)T：其次是他的定义：过去某一时间或是某一时间段内正在发生的动作。Step 5 Grammar 2(ppt7ppt10)T: the second grammar of this unit is to learn how to tell the difference of “while” and “when”. Do you know the meaning of tnose two wrds?S: it means “当时候”T: ok, good. Lets differences of the two words.( 老师以例句加阐述的方式讲述这两个单词的区别)1 . while意为“当时”引导时间状语从句时，表示时间段，从句通常使用延续性动词或表状态的词，或使用进行时态。例句：While Linda was sleeping, Jenny was helping Mary with her homework.2 .用while：表示某个动作正在进行的同时，另一动作也在进行之中，这时主从句都用进行时态，有对同类的两个动作进行对比的意味；也可表示某个动作正在进行时，另一动作发生了(该动作用一般过去时)。eg：While I was playing the piano，she was dancing.我在弹钢琴，她在跳舞。While she was reading，the telephone rang.当她正在看书时，电话铃响了。3.when也可表示“当时”，既可表示时间点又可表示时间段。When you called, I was taking a shower. 当你打电话来时，我正在洗澡。（表示时间点）Mother came in when she was crying. 当她正在哭的时候，妈妈进来了。（表示时间段）*当主句用过去进行时、从句用一般过去时，且从句放在后面时，表示主句动作正在进行时从句动作突然发生了，强调突然性。I was having supper (when someone knocked at the door). 我正在吃晚饭，突然有人敲门了。Step 6 Practice (ppt11 & ppt12)T: lets do some exercise. I will give you 6 minutes to finish 4b in your book. S: No problem.T: Ok, times up. Any volunteer?T: Luo Manglan, please.S: while, was, was.T: Tell me the reason?S: while 用于对比的句子。I 与 my brother 都是三单，所以用was.T: Hu Yanting,please.S: while, eating 是个持续性动词。T: Li Jin