高中英语人教版必修三教师版学案：Unit4Astronomythescienceofthestrars.doc

第  PAGE 5 页 共  NUMPAGES 5 页 教学内容教学设计Learning aims: Let students be familiar with the new words and phrases Learning key points: the usage of key words and phrases Learning difficult points: the usage of key words and phrases 【学案使用说明】提前认真预习单词的前提下完成【课前预习】 检查学生单词读音，纠错。 【自主 合作 探究】 1. unlike prep.不同;不像　adj.不同的,相异的 区别unlike/dislike ①They are so ______that nobody believes they are sisters. ②I am shy and I ______ being talked about ③____her younger brother, she studies very hard . ④(2013·东营高一检测)The festival has been a great success,______last year when it rained nonstop. A.like　　B.unlike　　C.alike　　D.dislike 2 . fundamental adj.基本的；基础的 n.基础,基本规律 be fundamental to 对必不可少的 The relationship with the students is fundamental to my work as a teacher . 3.harmful adj.有害的 反义词______ be harmful to= __________对……有害 阳光会对你的皮肤有害。 The sun can ___ ________ __ your skin ②Smoking is harmful to your lungs.=Smoking ________________吸烟对你的肺有害 4.exist vi.存在;生存 ①exist in　存在于……之中 ②exist on靠……为生/生存,与live on意思相近 ③There exists...表示“存在,有”,是there be句型的变式。用于该结构的动词还有live/stand/lie等。 练习①他们靠这点收入生存是不可能的。 It was impossible for them to ____ ___such a small income. ②众所周知,地球存在于宇宙之中。 As is well known to us, the earth _____ __ the universe. ③世界是什么时候产生的? When did the world _____ ____ ________? ④We can’t exist without food or water. 译:___________________________ ⑤Many experts believe that there may_____life on other planets. A.have　　　B.exist　　　C.are　　　D.is 【温馨提示】 exist是不及物动词,没有被动语态,也没有进行时 5.puzzle n.谜;难题 vt. vi.(使)迷惑/为难 【观察领悟】 阅读下列句子,写出puzzle在句中的含义。 ①It is still a puzzle to us why he did that. (puzzle n._______) ②What puzzled me was why they didn’t take his advice. (puzzle v. ________________) 【拓展延伸】 (1)be in a puzzle　　 感到困惑;不知如何是好 puzzle about/over 冥思苦想,苦苦思索 (2)puzzling adj.令人迷惑的,多用来修饰物 puzzled adj.感到迷惑不解的,多用来修饰人 be puzzled about 对……迷惑不解 ①这是十分令人困惑的问题之一。 This is one of the most ________ _________. ②这个学生对于下一步做什么伤透了脑筋。 The student ____ _______ __________