八年级下英语教案第31课时
【课题】：unit 6 how long have you been collecting shells? . section a (1a-2c)
【励志小木屋】：good habits are the best friends of man. 良好的习惯是益友
【学习目标】：
知识目标 1.识记并会运用单词collect, shell, pair, skate, since
2.理解并运用短语 for five years, a pair of...
3. 掌握并运用句型(1) --- how long have you been skating ?
--- i have been skating for five hours.
(2) --- how long have you been skating ?
--- i have been skating since i was seven years old.
能力目标：能用新句型进行对话，了解完成时态的用法。
情感目标：培养学生们的交际能力，以及相互帮助和合作的能力。
【学习重难点】：重点：现在完成时态的构成及用法，标志词.
难点：have /has been and have/has gone 的区别.
一、自主预习
（一）预习任务
task one 预习本单元的单词 1）个人自读，记忆本课单词2）小组互相检查单词读的.情况
收集_______ 贝壳________ 一双 __________溜冰鞋__________ 自从_____马拉松赛跑 ____________ 一双溜冰鞋 ____________ 在马拉松赛中 _______
task two：自主预习1b,2a,2b的听力
1．试译以下句子i’ve been skating for five hours.______________
i skated for four hours.________________________
2． 以上两个句子有什么区别_________________
3．拓展练习 a. 自从八点开始，我就已经滑冰了。__________________________
b. 我读过这本书._________________
c. 我收集贝壳已经两年了。_____________________________
task three ：how 的相关词组:
how________多少（钱） how _______多少(人) how________多远 how ________多久一次 how_______多大 how ________ 多久以后
（二）预习诊断. 从b栏中找出a栏相应的答语
a
1．how long has alison been skating?
2．how long did sam skate?
3．was this your first skating marathon ?
4．do you skate every day ?
5．when did you get your first pair of skates ?
b
a . yes , i do.
b . no, iskated in a marathon last year.
c . she has been skating for five hours.
d . on my tenth birthday.
e . he skated for four hours.
（三）预习反思 do you have any questions ?
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