Unit 10 By the time I got outside,the bus had already left.

play the recording for the first time.t: listen again and number the pictures in the correct order.play the recording for the second time.t: lisa, what’s your order?...check the answers.t: you’ll listen to the conversation again. this time fill in the blanks in 2b with the correct verb forms.play the recording again. after the ss fill the blanks, check the answers.t: after listening, we know that the teacher had already started teaching by the time tina walked into class. now make up an ending for the story and share it with the class. tell what happened to tina when she entered the classroom. sample endings: 1. when tina walked into class, the class had already begun. the teacher looked at tina and asked why she was late. her face turned red and told the teacher that she got up late and missed the bus and she had to walk to school. the teacher told her to get up earlier and never to be late again. 2. when tina rushed into class, the teacher had already started teaching. the teacher looked at tina and asked why she got to school late. she told her teacher that the traffic was heavy and it took her a long time to get to school. the teacher looked at her and said, “i believe you are a good and honest student.” tina’s face turned red and she realized she was wrong and told the truth to her teacher.step v  grammar focus (p77)t: look at the grammar focus box on page 77. now who’d like to read the sentences to the class?ask a student to read the sentences in the box.t: well done. now we know that when we talk about things that happened before past events, we often use past perfect tense. well, do you know the differences between present perfect tense and past perfect tense?show the following to the ss.(1)    she has taught english for 6 years.(2)     “where is susan” “she has   gone to america”.表示過去某時發生的動作，這動作可能剛剛停止,也可能還在進行。(1)    she said she had taught english for 6 years.(2) by the time i got to london, she had gone to america.表示過去某時之前發生的動作。 point out the differences between the sentences above.t: from the above examples, we can see the differences between present perfect tense and past perfect tens. so we can reach the following conclusion:show the following to the ss.現在完成時: 主語 + have / has done過去完成時: 主語 + had donet: now read the following examples aloud. and observe how past perfect tense is used in them. and then translate them into chinese.