Book Unit4 Astronomy:the science of the stars Book Unit4 第3课时 词汇3【考点要求】学会辨析block、pull、break的相关介词短语。【教学目标】掌握重点词汇：block out、pull、cheer up等。基础知识过关1.spaceship 2.physicist 3.block out 4.extinct 5.comet 6.crash 7.now that 8.get the hang of 9.当心 10. 感到高兴 重难点过关1.block out挡住(光线)；不去想(回忆)e.g. A great dust cloud formed in the sky blocking out the sunlight.天空中形成了一团巨大的尘云,挡住了阳光。 拓展：block off block up block ones way 即学即练(填词)：The gas pipe has been blocked to prevent escapes.煤气管道已经关闭,以防漏气。Your bike has blocked my ,but could you move it away?你的自行车挡了我的路,请你移开点好吗?2.pull n& vt.拉(力)；拖；牵引力e.g.The little girl pulled her mothers clothes and told she wanted to go.这个小女孩拉了拉妈妈的衣角,告诉妈妈她想走。拓展：pull off pull through pull in pull up pull out 即学即练(填词)：I didnt notice the train had already pulled .我没有注意到火车已经进站了。The driver pulled at the gate of our school.司机把车停在我们校门口了。3.cheer up感到高兴；感到振奋；高兴起来 adj.快乐的；兴高采烈的e.g. I cheered up immediately.我立刻感到很高兴e.g. I tried to cheer her up by telling her the good news.我把这个好消息告诉了她,想使她高兴起来。e.g. The cheering news made the cheerless boy cheerful,which made his parents cheer up too.这个令人兴奋的消息使得这个不愉快的小男孩高兴起来,他的父母亲也感到高兴。用法：cheerless adj. cheering adj. 拓展：(1)cheer on (2)cheers 即学即练(填词)：To our friendship and health, !让我们为我们的友谊和健康,干杯!We did our best to cheer him when he was about to give up.当他将要放弃时我们尽力鼓励他。语境助记4.break out突发；爆发(教材P31)We watched,amazed as fire broke out on the outside of the spaceship as the earths gravity increased.我们惊奇地看着,随着地球引力的增加,宇宙飞船的外层燃烧起火来。拓展：break away frombreak down break in break into break through break up egIf you go on working like that,you will break down sooner or later.如果你继续像那样工作的话,你迟早会累垮的。A thief broke into my house and stole my necklace.一个小偷闯进我家偷走了我的项链。即学即练(填词)：When the fire ,my wife nearly .Immediately I the house and the thick smoke to find my daughter；finally we successfully the burning building.当大火燃烧时,我的妻子几乎崩溃,我立即破门而入,并且冲破重重浓烟去寻找我的女儿；最后,我们成功逃离这燃烧的大楼。