约3220字。

　　Unit10
　　By the time I got outside , the bus had already left.导学案
　　主备：吴小平 审稿： English teachers of Grade 9
　　单元目标: 掌握过去完成时态 （共5课时） 
　　第一课时
　　学习内容:Section 1a~2c
　　学习重点：过去完成时
　　学习目标：重点单词、词组及短语。
　　词汇短语目标：
　　1.by the time  到…时候/ 之前+ 从句.常与过去完成时连用.从句用一般过去时,主句用过去完成时.
　　By the time I came into the classroom, the bell had rung.
　　in time 及时      
　　on time 按时；准时  
　　at times  有时
　　all the time 一直    
　　at that time 在那时
　　at the same time 同时
　　2．get- got – got/gotten
　　forget – forgot – forgot /forgotten
　　3.oversleep- overslept – overslept
　　4．ring- rang – rung
　　教学步骤：
　　Step1:Teach new words,then dictate
　　Step2:Lead- in :What do you usually do in the morning before school ? Are you late for class ?(describe)
　　Step3:Discuss in groups about 1a
　　Step4:Listen and complete 1b ,2a and 2b.
　　Step5:Work in pairs.
　　巩固练习:
　　一． 用所给的词的适当的形式填空。
　　1.By the time I________(get )into the classroom, the bell _____________(ring )
　　2.He was late for class yesterday morning ,because he ___________(oversleep)
　　3.When she _______(get ) to school, she ______(realize) she _____________(leave) her English book at home.
　　4.When I _________ (wap , my brother _________(get ) into the bathroom.
　　二．句型转换。
　　1．We had already had supper when he invited me to his party yesterday .(改否定句)