外研版八年级上册Module 8 Accidents Unit 3 Language in use .学案（无答案）

Module 8 Accidents Unit 3 Language in use
【学习目标】
1．学会区分when与while的区别与用法。
2．学会重点单词：appear、bite、show、throw的词义与变形。
3．学会重点短语：fall off、just in time、pay attention、side by side的词义。
【学习重难点】
重点：
1．when与while的区别与用法。
2．重点单词：appear、bite、show、throw的词义与变形。
3．重点短语：fall off、just in time、pay attention、side by side的词义。
难点：
1．when与while的区别与用法。
2．重点单词与短语。
【学习过程】
一、新知学习
1．when与while的区别与用法。
（1）when是at or during the time that，既指时间点，也可指一段时间，while是during the time that，只指一段时间，因此when引导的时间状语从句中的动词可以是终止性动词，也可以是延续性动词，而while从句中的动词必须是延续性动词。
（2）when说明从句的动作和主句的动作可以是同时，也可以是先后发生；while则强调主句的动作在从句动作的发生的过程中或主从句两个动作同时发生。
（3）由when引导的时间状语从句，主句用过去进行时，从句应用一般过去时；如果从句和主句的动作同时发生，两句都用过去进行时的时候，多用while引导，如：When the teacher came in, we were talking.当此句改变主从句的位置时，则为：While we were talking, the teacher came in. They were singing while we were dancing.
（4）when和while还可作并列连词。when表示“在那时”；while表示“而、却”，表对照关系。如：The children were running to move the bag of rice when they heard the sound of a motor bike.孩子们正要跑过去搬开那袋米，这时他们听到了摩托车的声音。He is strong while his brother is weak.他长得很结实，而他弟弟却很瘦弱。
2．学习单词和短语。
朗读词汇：appear、bite、show、throw。
朗读短语：fall off、just in time、pay attention、side by side。
二、达标检测
1．写出下列重点单词与短语的中文释义。
（1）appear __________________
（2）bite __________________
（3）show __________________
（4）throw __________________
（5）fall off __________________
（6）just in time __________________
（7）pay attention __________________
（8）side by side __________________
2．选择“while”或“when”，将句子补充完整。
（1）He was listening to music __________ he was riding his bike.
（2）I was waiting at the lights __________ I saw the boy fall off his bike.
（3）I was walking in the street __________ an accident happened.
（4）The driver was talking on his mobile phone __________ he was driving.
3．选词填空。
Doctor: When did the snake __________ you
Henry: Earlier this morning. It suddenly __________ in front of me and bit my hand.
Doctor: Can you __________ me a photo of it
Henry: Yes. Here it is.
Doctor: Oh, the snake was on a table.
Henry: Yes. I __________ it on the table after it bit me.
4．选择对应的短语，填空。
When the girl was riding her bike __________ with a friend, she had an accident. They were talking and they were not __________. A car came round the corner but stopped __________. The car did not hit her, but she __________ her bike.
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