(
课件网) Unit8 Safe and sound Grammar Lead-in 1 2 3 I was working when the earthquake started. People were running in all directions while pieces of glass and bricks were falling down. As I was trying to find my way out, I suddenly heard some noise above me. What were people doing when the earthquake happened Lead-in 过去进行时 Lead-in The past continuous tense Discovering ◇Look at the sentences. He was watching TV at nine yesterday. We were sleeping when you came. She was cooking dinner at that time. They were playing football that afternoon. You were reading when the telephone rang. I was washing my car at this time yesterday. What’s the rule Discovering ◇Circle the right verb. At this time yesterday, she is reading/was reading in the study. What were you doing/did you do at nine o’clock last night I am chatting/was chatting online with my friends when he came. It was raining/were raining yesterday. They were doing/did homework from 4:00 to 5:00 that afternoon. Use the rule! 行 Discovering Work out the rule! Essential Structure was / wasn’t were / weren’t + doing sb + 行 Discovering Work out the rule! ◆We use “was + doing” with the pronoun _____, _____, _____ and _____. ◆We use “were + doing” with the pronoun _____, _____ and _____. he she it I you they we Explaining Usage To talk about things that were happening at a particular time in the past. e.g. I was reading a book at 5 p.m. yesterday. She wasn’t chatting online just now. Were your parents watching TV at 9 last night What were they discussing all day last Sunday Communication show 1 2 3 at this time yesterday the whole night yesterday at 4 p.m. yesterday Make sentences 当堂反馈 The boys were playing football at 4 p.m. yesterday. The woman was shopping The girl was reading Explaining Difficulty: when, while, as They all mean “during the time that” and can be used to introduce a long action that started before a short action. e.g. When/While/As Millie was watching TV, Andy came into the sitting-room. _____ long action _____ short action Tip We use past continuous tense for the longer actions and past tense for the shorter actions. Explaining Attention 1. When there are two long actions, we often use “while”. e.g. We were watching in fear while the firemen were putting out the fire. _____ long action _____ long action Explaining Attention 2. If the shorter action is in the main clause, we can use “when, while or as” to join the clauses. When/While/As Millie was watching TV, lightening hit a nearby building. __ short action Explaining Attention 3. If the longer action is in the main clause, we often use “when” to join the clauses. e.g. Millie was watching TV when lightning hit a nearby building. _____ long action Comparison Summary ◆Past continuous tense: sb + was/were + doing ◆Present continuous tense: sb + am/is/are + doing ◆Simple past tense: sb + was/were/did Complete a conversation Communication show ◆Compl ... ...
