人教版英语必修3讲义Unit 4 Section Ⅱ Warming UpReadingLWord文件下载.docx

1、一度；同时at times 有时；偶尔at no time 决不in no time 马上；立刻We arrived in the summer，just in time to_enjoy（enjoy） the midnight sun.我们在夏天到达那里，正赶上欣赏半夜的太阳。At no time will China be the first to use nuclear weapons.中国在任何时候决不首先使用核武器。The kids will be leaving home in no time.孩子们很快就要离开家了。 harmful adj.有害的（教材P26）What many

2、 scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and seas.很多科学家相信，由于地球上长期有水存在，使地球得以把有害气体和酸性物质溶解在海洋里。be harmful to. 对有害harmless adj. 无害的do harm to sb.do sb.harm 对某人有害There is no harm in doing sth. 做某事没有害处（it does no harm

3、 to do sth.）Your smoking can be harmful to the health of your children.你吸烟会危及孩子的健康。Reading under the sun will do serious harm to your eyes.太阳底下看书会严重损伤视力。 【导学号：32222022】There is no harm in reading more booksIt does_no_harm_to_read more books.多读些书没坏处。 exist vi.存在；生存（教材P26）They laid eggs too and existe

4、d on the earth for more than 140 million years.它们也生蛋，在地球上存在了1亿4千多万年。（1）exist in 存在于中exist on 靠生活/生存There exists. 存在；有（2）existence n. 存在；生活in existence 现存的；现有的come into existence 产生；成立；开始存在He exists on selling fruits.他靠卖水果生存。There exists a tall tree in front of my home.在我家门前有一棵很高的树。It is said that th

5、e plant is the oldest in existence（exist）据说这种植物是现存最古老的。名师点津exist是不及物动词，没有被动语态，也没有进行时。there exist（某处）存在，有，是there be句型的变体。类似的结构还有：there stand，there lie，there live，there occur等。 in ones turn轮到某人；接着（教材P26）Thus they have，in their turn，become the most important animals on the planet.于是，它们接着成了这个行星上最重要的动物。i

6、n turn 依次；轮流；相应地；转而；反过来by turns 轮流；交替take turns to do sth. 轮流做某事Its ones turn to do sth. 轮到某人做某事They，in their turn，gave some advice for the plan.他们接着为这项计划提了一些建议。When it is in my turn，I am too excited to speak.当轮到我时，我激动得都说不出话来了。We take turns（turn） to deliver a speech in public.我们轮流在公众面前发表演讲。It is my

7、turn to_clean（clean） the classroom this week.这周轮到我打扫教室了。 prevent.from阻止；制止（教材P26）They are putting too much carbon dioxide into the atmosphere，which prevents heat from escaping from the earth into space.他们把过多的二氧化碳释放到大气层中，这就使得地球上的热量不能释放到太空中去。阻止做某事protect.from（against）. 保护不受侵袭 （from后接能带来伤害或损害之物）No one

8、can prevent him from going to Tibet by bike.没有人能够阻止他骑自行车去西藏。They were stopped/prevented from entering the burning building.他们被拦在了燃烧着的大楼外面。Soldiers have been sent to protect the crew against attack.已经派出士兵保护船员免遭袭击。from省还是不省？短语prevent/stop/protect.from.中的from可以省略，keep.from.中的from不能省略。但在被动结构中，from均不可省略。

9、 puzzle n. 谜；难题 vt.&vi.（使）迷惑；（使）为难（教材P27）How life began on earth is one of the biggest puzzles that scientists found hard to solve.地球上生命的起源是科学家们难以解决的最大疑惑之一。（1）be in a puzzle 感到困惑；不知如何是好（2）puzzle about/over 冥思苦想；苦苦思索（3）puzzling adj. 令人迷惑的（4）puzzled adj. 感到迷惑的be puzzled about 对迷惑不解Im in a puzzle as to

10、 how to get along with him.对于如何和他相处我感到困惑。语境助记The puzzled look on her face suggested she was puzzling over the puzzling math problem.她困惑的表情暗示了她正在思考那个令人困惑的数学问题。.语境填词1A report on _among middle school and high school students indicates that most _incidents between students begin with a relatively minor

11、insult（侮辱）（violent）2This object gives off_gases.They may do _to our health.You must make the object_before you use it.（harm）3Do you believe in the_of ghosts？Perhaps they only _in the minds of some people.（exist）4The students over there are_about the _ question.（puzzle）5_，there are two _ theories to

12、the outbreak of Cholera.（fundament）【答案】1.violence；violent2.harmful；harm；harmless3.existence；exist4.puzzled；puzzling5.Fundamentally；fundamental.选词填空in time，cool down，come into existence，give birth to，prevent.from.，depend on，in ones turn，for the first time1She didnt _ for hours after that argument.2He

13、alth _ good food，fresh air and enough sleep.3When school began last summer，most of us met _.4I was just _ for the flight.5We should try our best to _ the river _ being polluted. 【导学号：32222023】【答案】1.cool down2.depends on3.for the first time4.in time5.prevent；from （教材P25）What it was_to_become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe.随后它会变成什么没人能知道，直到3845亿年前之间，这团尘埃才慢慢地形成了一个固体的球状物。【要点提炼】“be to do结构”表示将来不可避免要发生的事，意为“注定”；也可表示按计划或安排要