课件14张PPT。If 的用法If conj. “如果; 假如; 倘若” 可表示条件 让步 虚拟等
If winter comes, can spring be far behind?
Even if my bones are crashed to powder, I’m not going to take a stop back.If, whether用法区别whether后面可接不定式, 但是if不能
I’m not sure whether to resign or stay on.
在介词之后用whether
It depends on whether the letter arrives in time.
whether还可以用来引导主与从句
Whether they win or lose is the same to me.
whether 后可直接用or not, 但if不可以
I’ll be happy whether or not I get the job.GARMMAR 倍数表示法once; twice; three times
This room is twice bigger than that one.
=This room is three times as big as that one.
=This room is three times the size of that one. 2. as…as… 和……一样……;
not as/ so…as ……不像……一样
Tom is as tall as his brother.
I have never seen a person as/so clever as he is.
3. “adj./ adv.的比较级+and+adj./adv.的比较级” 表示 “越来越……”
You are growing taller and taller.4. 多音节的形容词, 副词为 more and more +adj./adv.的原级
English is becoming more and more important.
5. “the+adj./ adv. 的比较级, the +adj./ adv. 的比较级” 表示 “越……就越……”
The more careful you are, the better you will do in the exam6. 比较级常使用修饰语, 表示 “程度上更……”
The moon is much smaller than the earth.
7. “the +adj./adv. 比较级+of the two +名词复数” 表示两者中最……
Jack is the taller of the two brothers.end 的用法at the end在末端
The stick is very thin at the end.
at the end of…在……末端; 在……末期
There is a supermarket at the end of the street.
by the end of 到……末为止, 只可指时间
We had finished this book by the end of last term.
in the end 最终; 最后
In the end we reached an agreement.mean的用法mean to do 打算去做
I mean to go tomorrow.
2. mean doing/n. 意味……
Missing the train means waiting for another hour.
Laziness means failure.
3. meaning n 意义; 目的; 意思
What’s the meaning of the word?4. means n. 方法; 手段(单复数同形)
There is/are no means to solve the problem.
by the means 用这种方式
by all means 无论如何; 必须
by means of 靠……手段/方式
by no means 绝不
5. mean it 当真; 说到做到
---you are joking! ---No, I mean it.lastly 的用法lastly 相当于last, 只用于逐项分说的 “最后”
Lastly, I want to say thanks to you.
later adv 后来 late adj adv 晚的,迟的
last adj/adv 上次; 最后
lately adv 最近 latest adj 最晚的; 最迟的辨析 because, since, as, for均表示 “原因”的连词, 语气由强到弱依次为 because since as for 其中 because, since, as为从属连词, 引导原因状语从句, for为并列连词
because 表示直接原因, 用来回答why的提问, 一般放在主句后面, 也可以单独存在
We were late because we couldn’t catch the bus.since 因为; 既然, 侧重主句, 从句表示显然的或已知的理由, 相当于now that
Since everyone is here, let’s start.
as 由于; 侧重主从并重, 从句说明原因, 主句说明结果.
As you were out, I left a message.
for 作为并列连词不可放句首, 表推断补充
He is loved by all, because he is honest.
=He is honest, for he is loved by all.
win, beat, defeatwin v. 宾语多指胜利 名声 奖赏 战役 比赛等
We won the game.
beat v. 宾语多为人, 指在比赛中赢了对方
Tom beat John in the game.
defeat v. 既可指在 比赛竞赛中击败对方, 也可指在战争战役中击败敌方
The brave soldiers defeated the enemy in the last battle.be supposed to do理应; 应该
Teachers are supposed to know a lot.
Everyone is supposed to obey the law.
2. 与否定词连用表示委婉的禁止
You are not supposed to smoke here.课件17张PPT。A Lesson in a LabDo you know ?Famous scientistsMatch the following1.physics
2.chemistry3.biologyAlfred Nobel
DarwinSteven Hawking
Li ZhengdaoThomas Edison
Albert Einstein
Newton
Madam Curie
exist v 存在Do you believe that God exists?
No living things exist on the moon
come into existence 相当于come into being
The PRC came into existence in 1949.
in existence 现存的
The church is the oldest wooden building in existence.The earth is forty-nine times larger than the moon.倍数表达法
A+谓语+倍数+as + adj /adv 原级+ as + B
The lake is four times as large as that one.
A+谓语+倍数+ adj /adv 比较级+ than + B
The lake is four times larger than that one
A+谓语+倍数+ the size/width of + B
The lake is four times the size of that one.Work in pairWe writeWe say400,000
2,000,000
5,100,000
48,000,500
50,567,489
123,456,789
four hundred thousand two million five million one hundred thousand forty-eight million, five hundred fifty million, five hundred and sixty-seven thousand
four hundred and eighty-nine one hundred and twenty-three million
four hundred and fifty-six thousand
seven hundred and eighty-nineFind the mistakes52,470,383----- fifty-two million, four hundred and seventy,
three hundred and eighty-three 100,000,000------ hundred million365,528,462----- three hundred and sixty-five million,
five hundred and twenty-eight thousand,
four hundred and sixty-two1,000,000,000----- one thousand/ one billion52,470,383----- fifty-two million,
four hundred and seventy thousand,
three hundred and eighty-three100,000,000------ one hundred millionfraction25 %33.3%80%10%75%50%66.7%Count theseWhat is ? of 6,000,000?
How much is 35,246,000
plus 12, 800,000?
What is 25% of 200,000,000?
How much is 260,408,396 plus
5,284,700?
What is ? of 1,000,500,000?
What is 10% of 800,000,000?Which one is larger?The earth is larger than the moon.
The earth is forty-nine times larger than the moon.
The earth is forty-nine times as large as the moon. time: (n)时间
times: (n)倍数
times: (prep) 乘
5 * 2 = 10
five times two is ten.2) Winter is four times colder in Harbin than in Beijing.
Winter is four times as cold in Harbin as in Beijing.
3) Mt. Qumolangma is about six times higher than Mt. Tai.
Mt. Qumolangma is about six times as high as Mt. Tai.
4) My aunt’s house is two times larger than my house.
My aunt’s house is two times as large as my house.
5) Tom weighs over twice as heavy as Lily.
Tom is over twice heavier than Lily.可修饰比较级的词 1） a bit, a little , rather, much, far,
many, a lot, lots, a great deal,
any, still
必须放在比较级形容词或副词的前面。
Cultural Coner Read the passage with the following questions.
1. Why has Mark become more and more interested in science?
2. Do you enjoy studying science? Why or why not?Fill the formchanged, never used toschool, excellentgood, lab, latest equipmenttakes, lectures, interestingfirst-class , wonhighest, proud
becoming,want to, going,astonished, thoughtTask: work in pairs to retell the passage.A is Mark Kendon.
B is a Chinese student who studies aboard.
For example:
B: What’s your feeling about science ?
A: My feeling about science have changed .课件11张PPT。Reading and Vocabularystage n 阶段; 时期; 舞台
The plan worked out well in the first stage.
When the actor stood on the stage in front of so many audience, he was very nervous.
v. 上演
That play was staged in the theatre. conclusion n. 结论
What’s the conclusion of the experiment?
固定搭配:
reach/draw/come to the conclusion
得出结论
jump to conclusions 匆忙下结论
v. 下结论; 推断
I concluded him that he was over fifty.
=I concluded him to be over fifty. react vi 反应Iron reacts with water and air to produce rust.
固定搭配
react to 对……有反应
The patient reacted badly to the drug.
react against… 反对……
The citizens reacted against the government’s control by violence.at the top ofat the top of 在顶部; 在上端
The result comes out that he is at the top.
辨析: at the top of, on the top of
at the top of 在顶部; 在上端
We sat at the top of hill.
He is talking at the top of his voice.
on top of “完全控制; 除……之外; 在……之上”
He writes for the newspaper on top of his regular.at least at least 至少; 最少 反义词为at most
He is at least over sixty.
in the least 一点也不; 丝毫
It doesn’t matter in the least.ordinary, common, general, usual ordinary 平常; 平淡无奇, 意思与common接近
ordinary work 平常的工作
ordinary dress 便服
common 常见的; 普通的; 不足为奇的, 指符合全体所共有的特征
common sense 常识
common people 老百姓general 普通的; 一般的; 是相对于 “个别”而言
in general 大体上; 一般来说
usual 强调习惯性的, 一贯如此
He didn’t write me back as usual.
他没有像往常一样给我回信.
Today he got up earlier than usual.
今天他比平常起得早.用common, general, ordinary, usual 填空Their ________ interest is playing football.
He sat in his __________ seat.
The book is written for the ___________ readers.
I like to be in ___________ dress.commonusualgeneralordinarymake sure of/about + n 确保; 务必;查明
make sure +
that
Please make sure that lights are turned off.
We have made sure of the time and place of the meeting.
add add…to…把……加到……上
Add 4 to 6 and you get 10.
add to 增加
The boss decided to add to his wages.
add up 加起来
Add up all the figures and see if the sum is correct.keep…out of…keep…out of… 使……不入内; keep out of 不接近, 不卷入
Keep the dog out of the door.
keep doing sth 连续做某事
keep up with… 跟上……
keep on doing sth 坚持做某事; 继续做某事
keep sb from doing 禁止某人做……
keep away from 不接近; 不靠近
keep up 维持; 继续下去
keep back 抑制; 扣下; 留下
