高一英语必修四第三单元.ppt

Introduction – 1. Discussion (1) Do you know this man? What do you know about him? Introduction – 1. Discussion (2) Look at the pictures on the screen and discuss the meaning of them. (教材原句P22)When in Rome，do as the Romans do.入乡随俗。 When in Rome＝When you are in Rome.从句中主语和be动词省略了。 when，while，if，whenever，until/till，once，though，unless，等引导的从句中，如果其谓语为be，而主语与主句的主语相同时，则从句的主语和be可省略。有时从句的主语为it时，也可省略it或从句中的有关成分。 ①When (I am) in trouble，I always turn to my classmates for help. ②If (it is) possible，this machine can be fixed at once.可能的话，这台机器会立即修好。 ③She is shy and doesn’t speak until (she is) spoken to. 她很腼腆，你若不跟她说话她是不会开口的。 ④When (I was) walking along the street，I heard my name called.当我一个人在街上走的时候，我听见有人叫我的名字。 ⑤Unless (it is) necessary，you’d better not refer to the dictionary. 除非有必要，你最好不要参考词典。 活学活用： The experiment shows that proper amounts of exercise，if ________regularly，can improve our health. A．being carried out B．carrying out C．carried out D．to carry out refer to...：指的是；提及……;查阅；参考 refer to sb./sth.：提到某人/物；涉及到某人/物 refer to...as...：将……称为…… refer to a dictionary：查字典 refer的过去式，过去分词和现在分词都先双写“r”，再加上“-ed”或“-ing”。类似的词还有：prefer。 blank adj. 空白的；茫然的　n. 空白处 Write your name in the blank space. 把你的名字写在空白处。 go blank 空白；变得茫然 Suddenly the screen went blank. 屏幕突然变成一片空白。 [活学活用] When we talk to others, our mind may goes ________. A. nothing B. none C. empty D. blank 答案与解析　D　句意：当我们同其他人谈话时，我们的大脑有时会一片空白。blank“无表情；不理解”； go blank“变得茫然，一片空白”，为固定搭配。A、B搭配不当。go empty “没有意义或目的”。 D panic v. n. 恐慌；惊慌 The fire caused a panic in the city. 大火使全城的人惊慌失措。 拓展　 panic sb. into doing sth. 使某人(因惊慌)仓促做…… in (a) panic 惊恐地；感到惊慌 get into a panic 陷入惊(恐)慌 注意:panic的过去式、过去分词、现在分词的拼写要把c变为ck再加ed或ing。 [活学活用] The police appeared in front of the criminal suddenly, and the criminal ________ very much. A. panicked B. frightened C. worried D. shook 答案与解析　A　句意：警察突然出现在罪犯面前，罪犯变的惊慌失措。panic意为“惊慌；慌乱”，符合句意。frighten意为“使害怕”； worr