Unit 3  What were you doing when the UFO arrived ?(新目標八下)

unit 3  what were you doing when the ufo arrived ? teaching goals :1.     words : barber shop , well , bathroom , accident , earth , silence , playground , around , strange , kitchen , modern , follow , shirt .2.     when , while 引導的時間狀語從句。3.     學習過去進行時態。4.     利用知識談論過去發生的事情。5.     復習過去式，學會講故事。6.     了解一些自然科學知識和社會科學知識。important and difficult points:1.     when , while 引導的時間狀語從句。2.     學習過去進行時態。teaching aids : a tape-recorder , cards .period  1teaching procedures :step 1  leading in 1.     greetings and free-talk .2.     check the homework .3.     dictate the words in unit 2 .step 2  pre-tasksb page 18 , 1a .1.     point to the sentences .read the sentences .explain what each one means .2.     look at the picture .point out the six people .match the statements with the people in the picture .3.     check the answers .4.     practice reading .step 3  while-tasksb page 18 , 1b .1.     read the instructions .make sure the ss understand what they should do .2.     look at the dialogue in the picture .explain :  過去進行時態的構成: was / were + doing  .用法:表示過去某一時刻或某一段時間正在進行的動作，一般用時間狀語來表示。i was standing in front of the library when the ufo arrived .3.     play the tape twice . circle the correct responses .4.     check the answers .step 4  post-tasktalk about what people were doing when the ufo arrived .step 5  while-tasksb page 19 , 2a .1.     read the sentences .make sure the ss understand what they mean .2.     play the tape twice .order these statements .3.     play the tape again ,correct the answers .sb page 19 , 2b .1.     read the instructions .2.     play the recording .write “when” or “while” on each line .3.     play the recording again ,correct their answers .notice: when / while ※     when comes before a quick action that happens only once .the word “while” comes from an action that continues for some time .step 6  post-task