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

then ask the students to read the article aloud. move around the classroom while they are reading, offering help as needed.
next ask students to pick out the sentences with the past perfect tense. tell them to underline them and come up with the reason to use the tence.
ask two students to read their answers and explain the sentences.
step ⅲ 3b
call the students’ attention to the photo of the woman sleeping. the girl is sleeping. she may oversleep. how about you?
have you ever overslept?
get a students to answer the question simply, such as yes, i have. /no, i haven’t.
then ask one student to read the instructions to the class.
explain that describe the circumstances means to tell when, where and how the things happened.
ask one student who has ever overslept to answer the first question and describe the circumstance. help him or her use the past perfect tense to describe the circumstance.
then ask students to read the questions and write their answers in their exercise books. tell them that they have to describe the circumstances if their answers are yes, and there should be at least one sentence with the past perfect tense in each description. move around the classroom providing sentences to the ones who need. ask several students to share their stories with the class. correct any mistakes they may make. let them check the answers in pairs.
step ⅳ 3c
ask the whole class to read the instructions together. then call the students’ attention to the sample conversation on the right. ask a pair of the students to read the conversation to the class. please ask your partner the questions in activity 3b. ask more questions if he or she says "yes".
ask the students to work in pairs. encourage them to ask as many questions as they can. as they work, move around the room offering help and answering questions as needed. ask some pairs to say their conversations to the class.
step ⅵ homework
1. write the answers to the questions in activity 3b.
2. write a conversation in activity 3c.

the fourth period
i. teaching aims and demands
1. knowledge objects
（1） key vocabulary
costume, show up, exhausted, embarrassed, empty, fool, april fool’s day, go off, stay up
（2）target language
when i got there, i found that he had fooled me.
after an hour, the other kids showld up, and i realized that my brother had fooled me.
by the time i got to match class, i was exhausted because i had stayed up all night studying.
i found out that my friend had fooled me.
2. ability objects