资料简介：
==================资料简介======================
Book 2 Unit 1 Cultural relics
Period 4 Learning about language and Grammar
导学目标
1.掌握学案中所列词汇:furniture, take apart和…when…句型. 2.辨别限制性与非限制性定语从句的区别.
自主学习
1. One day he was_looking in a second-hand furniture shop when he saw an amazing object among the many different vases and jewels.(P3) 一天，他正在一家二手家具店里查看，这时他(突然)在众多不同的花瓶和首饰中看见了一个神奇的东西。
品味典例：
I was thinking of this when I heard my name called.我正想着这件事时，突然听到有人叫我的名字。
I was reading a book attentively when an old friend came to see me.
我正在全神贯注地读一本书，忽然一位老友来访。
归纳拓展：
be doing...when...意为“正在做…这时(突然)…”，when作并列连词。相当于and then，and at that time。
be about to do...when... =be on the point of doing...when... 即将做……这时……
had just done...when... 刚做完……这时……
品味典例：
I was about to swim in the river when the guide told me there were man-eating fish in it.
我正要下河游泳，这时导游告诉我河里有食人鱼。
He was on the point of leaving when someone knocked at the door.他正要走，这时有人敲门。
We had just fallen asleep when the bell rang. 我们刚刚入睡，铃声就响了起来。
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人教版高中英语必修二学案：unit 1 cultural relics period 4 learning about language and grammar.doc
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