广东省普通高中2020年高中英语学业水平测试 Unit 4 Astronomy the science of stars课件 新人教版必修3.pptx

1、高中英语 ,必 修,Unit 4 Astronomy： the science of the stars,2,单词,system n. 系统；体系；制度 2theory n. 学说；理论 violent adj. 猛烈的；激烈的；强暴的 unlike prep. 不同；不像 harmful adj. 有害的 exist vi. 存在；生存 puzzle n. 谜；难题 vt. she is tall and her mother is very short. 玛丽不像她妈妈，她很高，而她妈妈很矮。 2)People _ those who are selfish. 人们不喜欢那些自私的人。,u

2、nlike,dislike,9,考点过关,练习：,6harmful adj. 有害的 拓展：【近义词组】do harm to 对有害 【反义词】harmless adj.没害的 【派生词】harmfully adv.有害地,1)Playing mobile phones will _ _ _ your health. 玩手机对你的健康有害。 2)It _ _ _ your eyes if you read on the bed. 躺在床上看书对你的眼睛不好。,do harm to,does harm to,10,考点过关,练习：,7exist vi. 存在；生存 拓展：【派生词】existen

3、ce n. 存在；生存 existent adj.存在的n生存者；存在的事物 搭配： exist in 存在于 exist on 靠生存,1)We cant _ without air. 我们没有空气就不能生存。 2)It was impossible for them to _ _ such a small income. 他们靠这么微薄的收入生活是不可能的。,exist,exist on,11,考点过关,练习：,8in ones turn 轮到某人；接着 拓展：【近义词组】in turn 轮流,1)The students clean the classroom every day _ _

4、. 学生们每天轮流打扫教室。 2)We should get on the bus_ _ 我们应该排队上车。,in turn,in turn,12,考点过关,练习：,9preventfrom 阻止；制止 拓展：【近义词组】stopfrom / keepfrom 阻止；防止,1)The heavy snow _ us _ going out. 大雪阻止我们出行。 2)The river should _ _ _ being polluted. 我们应该尽力防止河流污染。,prevent/stop/keep from,be prevent/stop/keep from,13,考点过关,练习：,10

5、now that 既然 拓展：【近义词】since conj.既然,1)_ _ I am free，I can enjoy music for a while. 既然有空，我可以享受一下音乐。 2)_ you have done that，stop blaming yourself. 既然你已经做了，就不要自责了。 3)_ _ you are grown up，you should not rely on your parents. 既然你长大了，就不应该依靠你的父母。,Now that,Now that,Since,14,考点过关,练习：,11break out 突发；爆发 拓展：【近义词组

6、】burst out 突发；猛然 搭配：break down 损坏； 坏掉,1)We had a fire_ _ last night. 昨晚我们那里发生了一场火灾。 2)My car _ _ so I have to go to work by bus. 我的车坏了，所以我不得不坐公交车上班。,broke down,broke out,15,考点过关,练习：,12watch out 密切注视；当心；提防 拓展：【近义词组】look out / be careful 当心,1)_ _！ Here comes the bus. 当心！车来了！ 2)You have to _ _ for thos

7、e people. 你得小心那些人。,watch out/be careful/look out,Watch out/Be careful/Look out,16,语法精讲,1定义：在句中作主语的名词性从句称为主语从句。引导词有that，whether，who，what等。 例如： (1)What I told you is true.我告诉你的都是真的。 (2)Who will go to America is still unknown.谁会去美国仍然不知道。,17,语法精讲,2形式主语：为了整个句子的平衡，主语从句经常后置，并用it充当形式主语，如果that引导的主语从句放在句首，则不可

8、以省略引导词that。 例如： (1)It doesnt matter whether she will come or not. 她来不来，都无关紧要。 (2)It has not been decided where the meeting is to be held. 在哪里开会还没决定。 (3)That the earth moves around the sun is a truth.地球围绕太阳转是真理。,18,语法精讲,练习：用适当的引导词填空。 1_ well go camping tomorrow depends on the weather. 2_ you need is a good rest. 3_ we should leave is a problem. 4_ is hard for this little child to find out the answer. 5_ it was done was a mystery.,Whether,What,When,It,How,19,语法精讲,6_ we shall be late is certain. 7_ I spend my summer is not decided yet. 8_ he didnt