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1、Period Grammar & Writing用所给词的适当形式填空1This part of the seabed _(explore) many times.2Much useful information about these planets _(collect) since 1971.3Much parking space in cities _(save) by using small cars.4They say that some icebergs in the Far South _(pull) to Kuwait for drinking purposes in the
2、future.5These questions _(discuss) at the next meeting.6A piano concert _(give) here last Friday.7Can the magazine _(take) out of the library?8Planes，cars and trains _(use) by business people for travelling.9The bike _(put) here，its dangerous.10Vegetables，eggs and fruits _(sell) in this shop.现在完成时的被
3、动语态现在完成时的被动语态表示到现在为止某事已经被完成或被做。这种语法项目既要表示现在已经完成又要表示被动的含义，因此很多同学在具体运用当中容易顾此失彼，难以把握。运用现在完成时的被动语态时应掌握以下几个问题：1构成现在完成时的被动语态的构成为：主语have/has been 过去分词其他。2各种句式的变化下面以动词invite为例，列表说明现在完成时的被动语态的句式变化：肯定句否定句I have been invited.He/She has been invited.We/You/They have been invited.I have not been invited.He/She h
4、as not been invited.We/You/They have not been invited.疑问句简略回答肯定回答否定回答一般疑问句：Have I been invited？Has he/she been invited？Have we/you/they been invited？特殊疑问句：Who has been invited？Why have I been invited？When has he/she been invited？Where have we/you/they been invited？Yes，I have.Yes，he/she has.Yes，we/yo
5、u/they have.No，I havent.No，he/she hasnt.No，we/you/they havent.3.使用的场合(1)表示一个被动的动作发生在说话之前，强调对现在造成的影响或结果。Thousands of manmade satellites have_been_sent_up_into_space by many countries.许多国家已经发射了成千的人造卫星到太空中去。(2)表示一个被动的动作或状态开始于过去，持续到现在，并可能持续下去，常与for或since引导的时间状语连用，或用于“How long.？”句型中。The important problem
6、 has_been_discussed for nearly two weeks.那个重要的问题已经被讨论近两个星期了。How long has the machine been_used?这台机器使用多久了？More than ten bridges have_been_built over the river in this city since it set up a new economic zone.自从这个城市建立了一个新经济开发区以来，这条河上已经建了十多座桥了。4现在完成时的被动语态应注意的几个问题(1)现在完成时的被动语态的两个助动词，即have/has和been，两者缺一不
7、可。(2)现在完成时的被动语态与一般过去时的被动语态的区别。一般过去时的被动语态所表示的动作或状态与现在的情况没有联系，而现在完成时的被动语态则强调与现在的情况有联系。The bridge was_built last year.这座桥是去年建成的。The bridge has_been_built.这座桥已经建好了。(3)一些特殊动词，如：borrow，finish，begin，buy，start，return，marry，open，join等构成的现在完成时的被动语态不能与表示一段时间的状语连用。若要表达相应的意思，则须改换动词或时态。这本书买了多长时间了？【误】How long has
8、this book been bought?【正】How long ago was this book bought?但这类动词的否定式可表示动作的持续过程，具有延续性，因而可与since或for构成的时间状语连用。No books have been bought since last week.自上周以来，没有人来买书。1Every year a flood of farmers arrive in Shenzhen for the moneymaking jobs they_before leaving their hometowns.(2010福建，28)ApromisedBwere
9、promisedChave promisedDhave been promised2Why does the Lake smell terrible?Because large quantities of water _.(2009福建，22)Ahave pollutedBis being pollutedChas been pollutedDhave been polluted3His sister left home in 1998，and _ since.(2009全国，26)Ahad not been heard ofBhas not been heard ofChad not hea
10、rd ofDhas not heard of4I like these English songs and they_many times on the radio.(2008安徽，33)Ataught Bhave taughtCare taught Dhave been taught5Though we dont know what was discussed, yet we can feel the topic_.(2008陕西，17)Ahad changed Bwill changeCwas changed Dhas been changed写作训练说明文operate，let alon
11、e，flexible，convenient，enable，edit，browse，download，make，help，too much/many1Its almost impossible to operate a computer without a mouse, let alone surf the Internet.2A wellchosen mouse is really handy, flexible and convenient in controlling the screen.3It enables us to edit text, browse web page and d
12、ownload what we want.4A convenient tool can certainly make our work easier, but it doesnt always help in a positive way.5Too much ready information on our fingertips leaves little room for knowledge pursuing.6Relying too much on mouse clicking makes us lazier and less creative both mentally and phys
13、ically.鼠标是计算机时代最佳的人机交互工具之一。它极大地方便了人们的计算机操作。但是，过分依赖鼠标的习惯也会带来一些不利影响。请你以鼠标为切入点，根据下表所提示的信息，用英语写一篇短文。鼠标的必要性对多数人来说，操作计算机，上网冲浪鼠标的便捷性点击、移动、插入、拷贝、删除编辑文本，搜索信息收发邮件，选购商品点播音乐，下载电影如果过分依赖鼠标(请结合自身感受，列举两到三点)注意：对所给要点逐一陈述，适当发挥，不要简单翻译。The mouse is a most effective device used by people to communicate with a computer.Fo
14、r most people, its almost impossible to operate a computer without a mouse, let alone surf the Internet. A wellchosen mouse is really handy, flexible and convenient in controlling the screen. With the functions of inserting, deleting, moving and copying, it enables us to edit text, browse web page and download what we want. It can even bring us a flood of music, movies and PC games.Just imagine, all this can be done with a cute mouse.A convenient tool can certainly make our work easier, but it doesnt always help in a positive way. Too much ready information on our fingertips leaves li
