Module 4 Seeing the doctor Unit 3 Language in use 教学课件

课件45张PPT。八年级下册4Seeing the doctorModuleUnit 3 Language in use. What have we learned in Module 4 ? Seeing the doctor illnesscough fever cold stomach ache toothache headache for +时间段 since +时间点 since +句子Present Perfectadvice I haven’t done much exercise since I got my computer last year. I have had him for three months now. Since then, it has become part of my life.Language practice 现在完成时（三）当表示动作已经充成并对现在有一定影响时，我们一般用现在充成时。同时，可分别 用just, already或yet加以强调或说明。 其结构也是： have / has +动词的过去分词. 常用的时间状语有: already, just, 一般置于have/has 之后，用于肯定句中；在否定句中则要用yet 表示“还，未”。Grammarfor 和 since 在现在完成时中的应用for与since都能与现在完成时连用，但区别较大： （1）for后须接“时间段” He has studied English for five years. 他学英语5年了。 （2）since后须接“时间点” He has studied English since 1999. 他从1999年开始学英语。（3）二者可以转换 for + 一段时间 = since + 一段时间 + ago He has been here for five weeks. = He has been here since five weeks ago. 他到这儿已经有五个星期了。如： He has taught here since he came to China. 自从他来到中国就在这儿教书。 We have been friends since we met in school. 我们从在学校见面起就成为了好朋友。(4) since能引导时间状语从句(主句用现在完成时，从句用一般过去时)，而for则不能。（5）现在完成时常用句型： ①It is (has been) +时间段+ since +时间状语或从句 It is four days since last Friday. 从上周五到现在已经四天了。 It has been two years since Jim came to Beijing. 吉姆来北京已经两年了。②This is the first (second…) time that + 从句 句型中的that从句通常使用现在完成时。 如： This is the first time that Jenny and Danny have been to China. 这是珍妮和丹妮第一次来屮国。 This is the third time that I have seen Karen. 这是我第三次见到Karen。（6）均须与延续性动词连用，也可以与非延 续性动词的否定式连用。 如: I have bought this computer since four years ago. (×) I have had this computer since four years ago. (√) I haven’t bought anything for two months.(√ ) I haven't heard from him for 3 weeks. (√)非延续性动词和延续性动词的转换leave — be away borrow — keep buy — have begin/start — be on die — be dead finish -- be over open sth — keep sth open fall ill — be ill get up—be up, come here — be here, join — be on +组织机构 /be a member of + 组织机构, go there — be there, become — be, come back—be back, fall asleep — be asleep, get to/ arrive/reach — be (in), leave — be away from, get to know — know, go (get) out —tie out， put on—wear, catch a cold —have a cold, get married—be married 等。 The old man died 4 years ago. — The old man has been dead for 4 years. It is 4 years since the old man died. —Four years has passed since the old man died. He joined the Party 2 years ago. —He has been in the Party for 2 years. I bought the book 5 days ago. —I have had the book for 5 days.例如：（7）二者引出的时间状语往往用 how long提问。—How long have you had this book? 这本书你买多久了? —For a week./Since a week ago. 买一周了。 ... ...