1、The world of scienceUsing languageUnit 3Someone has broken the window.He has finished his homework.表示说话时表示说话时已经完成已经完成的动作，而且的动作，而且这个动作的结果这个动作的结果对现在还有影响对现在还有影响He has taught in our school for 30 years.表示表示动作发生在过去动作发生在过去，但，但一直持续到一直持续到现在现在，并且有可能继续持续下去，并且有可能继续持续下去时间状语时间状语 during/over/in the last/past+时间段,
2、.等时间状语since+时间点,already,recently,lately,so far,up to now,until now for时间段,ever sincethese days(years,months,weeks)1.During the last three decades,the number of people participating in physical fitness programs _(increase)sharply.2.Simon_(attend)his father for such a long time that he understands alm
3、ost every gesture of his fathers.3.I complained to the manager of the hotel about the poor service last week,but up to now,I _(receive)his reply.4.In recent months,the China Grand Canal Museum in Yangzhou,which exhibits the history and culture of the Grand Canal,_(attract)a great number of visitors.
4、have increasedhas attendedhavent receivedhas attractedQ:怎么知道上面用现在完成时的？怎么知道上面用现在完成时的？A:根据时间状语根据时间状语1.After several years of observation,the research group_(arrive)at the conclusion that language acquisition is faster when students are exposed to the situation where it is spoken.2.Great changes _(take
5、)place in my hometown and you can see that a lot of factories have been set up.has arrivedhave takenQ:上面的句子没有时间状语，为什么要用现在完成时？上面的句子没有时间状语，为什么要用现在完成时？A:根据语境；表示根据语境；表示“到目前为止，已经到目前为止，已经”1.It is the first time that the local education authority _(make)such strict requirements on going-to-school time for
6、primary and middle school students.2.It _(be)ten years since we met last time.3.We _(be)to Beijing four times,so this time we wont choose Beijing as a destination.has madeis/has beenhave beenQ:上面的句子没有时间状语，为什么要用现在完成时？上面的句子没有时间状语，为什么要用现在完成时？A:固定句型固定句型It is+序数词序数词+time that sb have/has done sth.It is/h
7、as been.时间时间 since sb did sth.sb.have/has done sth+次数次数You have slayed an enemyYou have been slayed by an enemy现在完成时的现在完成时的被动被动语态语态现在完成时现在完成时谓语谓语结构结构 主动主动被动被动have/has donehave/has been done(1)The door has been locked.(2)These flowers have been watered,and you can go home.(3)Our classroom has been cl
8、eaned,so you neednt clean it now.主语与谓语动词是主语与谓语动词是被动被动关系关系1.More than 50,000 yuan(raise)for the poor family since the group was founded.2.The famous musician,as well as his students,_(invite)to perform at the opening ceremony last night.3.In the last five years,Cao _(walk)through 34 countries in six
9、continents.has been raisedwas invitedhas walked3.This is the first time that a woman_(appoint)to the post.5.There _(be)a dramatic rise in the number of extreme weather events over the past 20 years,caused largely by rising global temperatures,according to a new report from the United Nations.has bee
10、nhas been appointedMany things in our lives have already been affected,3D-printed hamburgers have been served to customers in some restaurants in London.But perhaps the most significant success that has been achieved to date is in medicine.Human body parts,including a beating heart,have been made wi
11、th 3D printing technology.A new 3D-printed shell has been given to a turtle injured in a forest fire!Imagine you are Dr Moore.Look at the pictures and tell the police about the damage and loss to your lab.Use the present perfect passive where appropriate.The window has been broken.The lock on the door has been broken.My two laptops have been stolen.Beakers and test tubes have been destroyed.The robot has been damaged.
