Grammar 一等奖-精讲版课件

1、Grammar and usagethe Present Perfect Tense & the Present Perfect Continuous Tense现在完成时与现在完成进行时 Form:have/has+done the Present Perfect Tense现在完成时Do you know when we should use the present perfect tense? We use the present perfect tense to talk about actions that were completed only a short time ago (

2、1):The boys are tired. They _ (just play) a ball game.(Connection with the past: The boys played a ball game. Connection with the present: The boys are tired.) have just playedWe use the present perfect tense to talk about things that happened in the recent past, but are connected to the present.(2)

3、:The boy is very happy.The boy _(catch)a bird.(Connection with the past: The boy caught a bird. Connection with the present: The boy is happy. )has caughtWe use the present perfect tense to talk about something that started in the past, and is still happening now. came has lived _ past now future (3

4、):has lived Daniel _ (live) in Beijing since he came to China.(Connection with the past: Daniel came to China. Connection with the present: Daniel is living in China.) We can also use the present perfect tense for repeated actions. (4): I went to Egypt in 1986. I went to Egypt in 2004. I _ (be) to E

5、gypt twice. have been2. What is the basic structure of the present perfect tense?subject + auxiliary verb (has/have) +done+ objectsubjectaux. vmain vobject+I haveseenET.+You haveeatenmine._Shehasnotbeento Rome._Wehavenotplayedfootball.?HaveyoufinishedIt?HashedoneIt?3.We often use it with time expres

6、sions.Such as : already ever for just lately never recently since yetQ1. Whats the difference between already and yet?e.g. The boy has already come here.I havent heard anything from him yetTip: Already is for affirmative statements;Yet is for negative statementsComplete the following sentences with

7、the proper tense.1 We _ (study) English for about five years.2 They _ (live) in the south since their daughter was born.3 I _ (read) your article three times. Its well written.4 The student _ (finish) her homework already. 5 Eric _ (go) back to his hometown today. 6 The police _ (just finish) search

8、ing the area.have studiedhave livedhave readhas finishedhas gonehave just finished现在完成时与一般过去时的区别：一般过去时表示发生在过去的动作，和现在无关；现在完成时则强调某一发生在过去的动作与现在的关系，如对现在产生的结果或影响等。He _ (work) in the city for ten years.has worked完成下列句子：I _(see) this film yesterday. （强调看的动作发生过了）I _ (see) this film. （强调对现在的影响，电影的内容已经知道了）He

9、_ (be) in the League for three years. （在团内的状态可延续）He _ (join) the League three years ago. （强调加入的动作发生在过去）sawhave seenhas been joined现在完成时与一般过去时常用的时间状语：一般过去时常与具体的时间状语连用，而现在完成时通常与模糊的时间状语连用，或无时间状语。 一般过去时的时间状语：yesterday, last week，ago, in1980, in October, just now, in the past等，皆为具体的时间状语。 现在完成时的时间状语：for,

10、since, already, yet, so far, up to now, ever, never, recently, lately, just, in the past years,等，皆不确定的时间状语。用于现在完成时的特殊句型 1）It is the first / second time that结构中的从句部分，用现在完成时。例如： It is the first time that I _ (visit) the city. This is the first time （that） I _ (hear ) him sing.注意：It was the third time

11、that the boy _ (be) late. 2）This is +形容词最高级+that结构，that 从句要用现在完成时。例如： This is the best film that I _ ever _ (see). 典型例题（1） Do you know our town at all? No, this is the first time I _ here. A. was B. have been C. came D. am coming （2） Have you _ been to our town before? No, its the first time I _ her

12、e. A. even, come B. even, have come C. ever, come D. ever, have come have visitedhave heard had been haveseenBD一般过去时还是现在完成时？1 They _ (move) to the south in 1990 and _ (live) there since then.2 Eric _ (leave) home last year and _ (just come) back.3 Justin _ (be) away from home for several days. He _(

13、disappear) last Friday.4 They _(buy) this house three years ago and they _ (live) here since then. 5 My brother _ (go) to see my grandpa last week. He _ (visit) him three times this month.movedhave livedlefthas just comehas beendisappearedboughthave livedwenthas visitedRead the diary entry on Page 8 an