并不是所有的都相似。
Alive adj. 意思为“相同的；相像的”常做表语。
They were born on the same day. The two brothers are very much alike.
他俩出生于同一天。这兄弟俩长得很像。= They were born on the same day. The two brothers are very like.
他俩出生于同一天。这兄弟俩长得很像。
注意：like 之前可以用very 来修饰，但是alike之前则不行。另外，alike也可以用做副词。如：
You and I think alike.
你和我的想法一致。
Great minds think alike.
英雄所见略同。
12. … but many sharks feed on fish, other sea animals, smaller sharks and sometimes people.
……许多鲨鱼以鱼和其他的海洋动物，较小的鲨鱼为食，有时还以人为食。
Feed on sth. 以……为食
Cows feed on hay.
奶牛吃干草。
The children always feed on the best of food.
孩子们常常吃最好的食物。
13. It is said that one of the most dangerous sharks is the great white shark.
据说有一种最危险的鲨鱼是大白鲨。
It is said …据说……
It is said that you are good at operating computers.
据说你很会操作电脑。
It is said that the sports meeting will be put off till next Thursday.
英语教案－上学期 Unit 6 Mainly revision由www.jiaoshi66.com收集及整理,转载请说明出处www.jiaoshi66.com据说运动会会推迟至下周四举行。
类似的句型还有：
It is thought that … 据认为……
It is proved that … 据证明……
It is known that … 众所周知……
It is suggested that …据建议……
It is reported that … 据报道……
It is announced that …据宣布……
It is required that … 据要求……
It is required that we work eight hours a day. Sometime we work till midnight.
据要求我们一天要工八个小时。有时我们工作到半夜。
It was demanded that the working conditions be improved as soon as possible. But nothing is different, just like what you can see now.
根据要求，工作条件要尽快的改进。但是，如同你看到的，什么都没改变。
关于现在完成时态的归纳
1. 现在完成时态的结构have/has＋过去分词
2. 现在完成时涉及两个时间概念。一是过去，二是现在。谓语动词虽然所表示的动作发生在过去，但是该时态所强调的还是对现在的影响或结果。关键在于这种影响和结果正是说话人的兴趣所在。因而，该时态通常不带有时间状语。如：
The boy has come back.
孩子回来了。（意思是说孩子在家。）
I’ve lost my pen.
我把钢笔给丢了。（意思是说我现在没有钢笔用。）
3. 现在完成时态还可以用来表示开始于过去，且该状态一直延续至今而且还有可能继续下去的可能性的情况。谓语动词的动作通常是可持续的。如：
I have lived here for more than twenty years.
我在此住了二十多年了。
Nothing has happened ever since.
打那以后就什么也没有发生过，
4． 非延续性动词用于现在完成时态的时候，通常不带表示时间段的时间状语，因此不和for或者since连用。例如，不能说：
I have bought the house for two years / since two years ago.
而应当说：I bought the house two years ago.
或者说：I have had the house for two years.
或者说：It’s two years since I bought the house.
但是非延续性动词的否定式可以和表示一段时间的时间状语连用，表示这种动作的否定状态的延续。如：
I haven’t bought anything for a week / since you left.
我已经有一个礼拜没有买东西了。/自从你离开以后我没有买过任何东西。
5． 同学们应当特别注意的是，现在完成时态是一个属于现在时态的范畴，所以它可以和包括“现在时刻”在内的时间状语连用。如：
Now, today, this morning / week / month / year, by now, so far, up to now, already, before, just, ever, never, always, recently, lately.等等。如：
I have done nothing today.
我今天什么事情也没有干。
We have had four lessons this morning.
今天上午我们上了四节课。（说话时还没有超出上午的范围）
Have you seen her before?
你以前见过他吗？
6．当强调行为的行为时间、执行者、行为方式、行为场所、行为原因时，句中一般用一般过去时，而不用或者很少用现在完成时，间或用现在完成时也是为了强调结果。如：Who did it? How did he do it? Why did he do it? Where did he do it? When did he do it?
7．为了准确地判断动词的延续性和非延续性，请记住下面的歌诀：
动词延续非延续，要用“一直”加动词；
说得通是延续动词，说不通是非延续动词。
不能说：一直买buy/开始begin/借入borrow/到达reach,get to,arrive/参加join,等等。
可以说：一直有have/进行be on/保管keep/在……组织里be in/是……成员be a＋身份
如以下所示：
He has gone there.
他上那儿去了。
He has been there for two days.
他上那儿去了两天了。
He has bought a book.
他买了一本书。
He has had the book for 3 weeks.
他买这本书三周了。
She has borrowed a dictionary.
她借了一本词典。
She has kept the dictionary for 2 weeks.
他借这本词典两周了。
练习
将下列句子翻译成英文。
1. 从两点钟起我就在这里了。
2. 她已经走了一个礼拜了。
3. 从上礼拜五他就生病了。
4. 他参军已经有五年了。
5. 自从五年前他就在这里了。
参考答案：
1. I have been here since two o’clock.
2. She has been away for a week.
3. He has been ill since last Friday.
4. He has been in the army for five years.
5. He has lived here since five years ago.
教学设计方案
Lesson 21
Period: The First Period
Content: Lesson 21
Properties: Tape recorder, Overhead Projector, TV, pictures.
Teaching Objectives: Make the students use the language point in the dialogues.
the usage of the present Perfect Tense
Language Focus:
1. Useful expressions: have an accident; hurt badly;
2. The present Perfect Tense:
What’s happened? They’ve had an accident. Has anyone called the police? Yes, they have. Teaching Procedures:
Ⅰ. Organizing the class
Ask the students to get ready for class.
英语教案－上学期 Unit 6 Mainly revision由www.jiaoshi66.com收集及整理,转载请说明出处www.jiaoshi66.comⅡ. Revision
1. check homework.
2. Revise the present perfect Tense. Ask :
Have you ever been to the Great Wall?
How long have you lived in Beijing?
Get the students to answer the questions.
Make sure they can answer correctly.
Ⅲ. Presentation
1. Show a picture of an accident on TV. Get the students to watch and talk about the accident using some words, such as: have an accident, hurt, badly, fall off, hit …
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