英语八大时态2学案.pptVIP

现在进行时, 各种时态的用法 各种时态的用法 2.基本结构： 二.一般过去时的基本结构： 二、一般过去时 1.用法：a.表示过去某一时刻或某一段时间内所发生的动作或情况。 b.表示过去经常发生或反复发生的动作，常与表示频率的时间 状语连用。常用结构：used to do sth 标志词:yesterday,the day before yesterday, three days ago, last night/week/month…,in the past；just now=a moment ago Last year she often had a cold. When I was a child, I used to catch fishes in the river. 二、一般过去时 c. 在时间、条件状语从句中，从句用一般过去时. if引导的虚拟条件句(主句用过去将来时would+动词原形，从句用一般现在时态 when，while,after, before, not ...until, by the time引导的时间状语从句。 since +从句(一般过去时) 1.If I ______ (be ) you, I would talk on the phone with him. 2.What would you do if you ______ (have) a million dollars? 3.What were you doing when the UFO______ (land)? 4.I was reading a book when the teacher ________ (come ) into the classroom. 5.By the time I ______ (get ) outside, the bus had already left. 6.When I _______ (wake) up , my father had left home. 1.基本结构： A.现在进行：表示现在(说话瞬间)正在进行或发生的动作。 B.现阶段动作：目前一个时期一直在进行的动作，此刻不一定在进行。 He is taking physics this semester.（本学期） We are preparing for our final examination this semester. Mary is learning to paly the violin these days. C.表示位移的动词，如：go,come,leave, start, arrive等，其现在进行时表将来时。 Eg: My friend is leaving for America. D.现在进行时和always，all the time,foever等连用，表示说话人具有某种强烈的感情色彩。 3.The boy ____always ____ us! (夸赞) A.is;helping B.does;help C.can;help D./;help 5.Look!What___the children___ over there? 6.Those workers____here these months. A.are work B.are worked C.work D.are working 1.用法：过去某一时刻或某一时刻内正在进行或发生的动作。 2.标志词：at that time,this time yesterday,then,when… Many thnks! have /has been to+地点,表示“去过某地”。（人已回） I have been to Europe. (I am not in Europe now.) 3 have been in+地点+时间段,表示“在/来某地多久”。 I have been in Europe for three weeks. (I am now still in Europe .) 2 5.瞬间动词和延续性动词 若句中出现时间段，则必须使用延续性动词。瞬间动词和延续性动词转换关系如下： know get to know have buy be here come here keep borrow be married get married be in / be a member of be dead be away be on be closed be open be there be home close join open die get home leave go there begin/start 1.