课件16张PPT。Grammar and usagePresent perfect
present perfect continuousNo.27 Middle School Liu DongBoy missing, police puzzled"There is really no hard evidence that aliens took him. So, while we have not dismissed the idea, we are looking into other possibilities as well." Read Justin’s diary
I havn't seen my family since I travelled. I have just been to a camp and saw a Yeti there. I am still very excited about it. I have already visited the Great Pyramid in Egypt too. I loves Egypt but I haven't visited all the Pyramids yet.
I have seen crop circles in many places. I have travelled to the Indian Ocean many times looking for treasure. Although I have found many sunken ships, I haven't found any treasure yet.
I haven't seen aliens, so I want to travel to the outer space. I am very curious about them.What tense(时态) is mostly used?have/has(not)+donePastPresentHe has been observing aliens since he got there.He got there.He is observing the aliens.He has observed the aliens.How did Justin feel at the first time?He will continue observing them现在完成进行时
一. 基本结构
主语+have/has(not)been+doing
二. 基本用法
To talk about actions that started in the past and are still continuing.Differences1. The present perfect tense to talk about an action completed in the recent past, and the present perfect continuous tense for an action that started in the past and is ___________________.still happening The boy ________________books about maths and he will finish in an hour. The girl __________ books about maths and she feels happy now.has been readinghas readread She has lost weight because she
_______________________ for two months.
2. The present perfect tense for repeated actions, and the present perfect continuous tense for _________ actions.
non-stophas been running/dancing/exercising ...How long has he ___________(drive)?3.The present perfect tense to ask questions beginning with __________________, and the present perfect continuous tense to ask questions beginning with __________.
been drivinghow many/muchhow long We have _____(be) friends since we were born. We___________________( never quarrel ).
4.Use either a state verb or an action verb with the present perfect tense, only use an _______verb with the present perfect continuous tense
beenhave never quarreled
5.Use the present perfect tense, not the present perfect continuous tense, with words like _______________________.actionnever, yet, already and ever
1. (2010山东,30) Up to now, the program____ thousands of children who would have died.
A. would save B. saves C. have saved D.have been saving
2. (2010江苏,23)--Why, Jack, you look so tired!
--Well, I _____the house and I must finish the work tomorrow.
A. was painting B. will be painting
C. have painted D. have been painting
3. (2009 辽宁,24) Excuse me, Marcia, a reporter from
Vanity Fair ____all day. Could you speak to her now?
A. phones B. has phoned C. has been phoning D. phonedCDC(continue)(non-stop) seasonswith the help of the programselectWriting
Finish the short passage about the program
Up to now, The Voice of China has been broadcast two seasons. With the help of the program, some singers have become popular, which attracts young people to join the program. So the directors have been selecting good singers all day. To make the program better, the directors have been preparing for the next season for two months, and they hope it will be broadcast next year.Homework
1. Review the present perfect tense and present perfect continuous tense.
2. Finish exercises on page88 C1 and C2.