新人教版高中英语必修3 Unit4 Astronomy the science of the stars课件.ppt

14. They are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space. 阻止某人做某事 : prevent sb. (from) doing sth. stop sb. (from) doing sth. keep sb. from doing sth. 1) We must prevent them from making trouble. 2) You should prevent the child from injuring himself. If nothing prevents, … 如果没有什么阻碍的话 , … 15. Whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved. depend on sb. / sth. sb. to do sth. sb. doing sth. sb. /sth. for sth. 相信，信赖, 依靠,依赖, 视…而定，取决于 1) When you are in a strange place you’d better depend on the map. 2) You can’t depend on others to help you. 3) All living things depend on the sun for their growth. 4) He depends on his pen for his living. wh- 5) You can depend on him. He’ll lead you there. 6) Success depends on your own hard work. 7) Our success depends on whether everyone works hard. depend on it 没问题，请放心（句末或句首） That /It (all) depends. 那得看情况而定 1) Depend on it, you’ll succeed. 2) He may support me, but it depends . Tell him what you want to say; he’s a man to __. A. count B. believe C. trust D. depend 解析:相信/信赖某人: count on sb. believe in sb. depend on sb. trust (in) sb. C Word study: Translate the following into English 把……当作 太阳系 总有一天；及时 一般地说来 信赖；取决于 目前 做出选择 天文学 氧 阻止 think of …as solar system in time generally speaking depend on at present make choices astronomy oxygen prevent …from … make watch wonder be cool multiply begin exist explode Where do we come from? How did the universe __________ ? When we _______ the stars through the telescope, we _________ why the universe ________ . After the “Big Bang” ,the earth ______ just a cloud of energetic dust. Somehow it _________ loudly with fire and rock, which ______ the earth’s atmosphere. As the earth _______ down water _______ to appear on its surface, wh