Unit 3 Language in use

1. If you want to turn on the recorder , press the blue button.2. If you like great music, please welcome Sally Maxwell.3. If the red light doesn’t come on, wait for thirty seconds.4. If there’s no green light, choose the “copy” symbol.

If 表示“如果”、“假如”引导条件状语从句。如果从句谈论的是一个有可能发生的事实及其产生的相关的结果，主句用一般将来时态，从句用一般现在时态。如： We can walk there if we can't find a bus . If it rains tomorrow ,we will not go to the zoo. What will you do if you find a panda in danger.条件状语从句和主句还有一个共同的伙伴，有时它可以替代从句和主句，它就是“祈使句 +and / or+ 简单句”。其中 and 表示句意顺承；or 则表示转折，意为“否则”。例如： 　　

If you work harder, you’ll pass the exam. = Work harder, and you’ll pass the exam. 如果你再努力些，你就会通过考试。If you don’t hurry up, you’ll miss the train. = Hurry up, or you’ll miss the train. 如果你不快点儿，你就赶不上火车了。 　在学习条件状语从句时，同学们要注意以下几点： 1. 时态呼应　一般来讲，复合句都要遵循主、从句时态呼应规律，状语从句也不例外。即主句用现在时，从句也用现在时；主句用过去时，从句也用过去的某种时态。具体地讲，主句是一般现在时 ( 包括祈使句和含有情态动词 can, may, must 等 ) ，从句也用一般现在时。

例如： Have a good rest if you are tired. 如果你累了，就好好休息一会儿吧。 　　 You must see the doctor if you are ill. 如果你生病了，就必须去看医生。 特别要注意：如果主句是一般将来时态，这时从句不可以用将来时态，而要用一般现在时。例如：I won’t go there with you if it rains tomorrow. 如果明天下雨的话，我就不和你一起去那儿了。 If we do nothing, there will be only standing room on the earth. 假如我们不采取任何措施，地球上将只有站的地方了。

2. 主从句的位置 大多数情况下，从句可以位于主句之前，也可以位于主句之后。不过从句在前时，主从句之间必须用逗号隔开。例如： Please tell me if he comes back. = If he comes back, please tell me. 如果他回来了，请告诉我一声。

Complete the sentences with the correct form of the words in Activity 1.

1. If you ______ (want) to know how it works, ______ (read) the instructions. 2. If you ______ (want) to listen to music, _________ (choose) a CD. 3. If you ______ (buy) a new camera, ______ (get) a good one. 4. If the light ____________ (not, come) on, ______ (wait) for one minute. 5. If you ______ (want) to keep the picture,

______ (save) it on your computer.

want read

want choose buy get

doesn't come wait want save

6. If it ____________(not, work) , ______ (wait) a minute and then _______ (try) again. 7. If you ______ (need) to send an email, _____ (use) my computer. 8. If you _____________ (not, know) how to use the camera, ______ (read) the instructions. 9. If you _________ (not, like) the programme , ______ (turn) the TV off .

doesn't work wait try

need use

don't know read

don't like turn

Write instructions1. record/press/red key

__________________________________.

2. send/a text message/use/mobile phone

__________________________________

_______________.

3. like/the pictures/save/on the computer

__________________________

_________________________.

If you want to record, press the red key

If you want to send a text message, use

the mobile phone

If you like the pictures, save

them on the computer

4. find out/ how it works/ read/ instructions

________________________________

___________________.

5. see/ photos/ look on/ website

_________________________________

_______.

If you want to find out how it works,

read the instructions

If you want to see photos, look on the

website

Ask and answer.What do you do if ...e.g. : want to turn on the recorder? press the blue button―What do you do if you want to turn on the recorder?―I press the blue button.

1. want to record? press the red button2. want to keep the photos? save / on the computer3. want to send text messages? use a mobile phone4. want to find out how to use the camera? read the instructions5. want to watch the news? turn on the TV

1. What do you do if you want to record? I press the red button.2. What do you do if you want to keep the photos? I save them on the computer.3. What do you do if you want to send text messages? I use a mobile phone.4. What do you do if you want to find out how to use the camera? I read the instructions.5. What do you do if you want to watch the news? I turn on the TV.

Complete the passage with the correct form of the words and expressions in the box.button; choose; copy; connect; instruction; light; play back; memory; symbol; turn on Getting to Know Your Cd RecorderFollow these (1)___________ for the best results. First, press the blue (2)_________ to (3)_________ the recorder. When you're ready to record,

instructionsbutton

turn on

press the red button. The (4)_________ comes on to show you that it's recording. If you want to (5)___________, press the green button. The recorder has only a small (6)_________. To (7)_________ your recording, (8)_________ the recorder to your computer. (9)_________ the "copy" (10)_________ and save the recording on the computer.

light

play back

memory copyconnect

Choosesymbol

Listen and check the true sentences.

1. The prices of the mobile phones are different.  2. All mobile phones can send text messages.  3. The woman only wants to make calls.  4. The woman isn't interested in a camera phone.  5. The man shows the woman a phone that can save music.  6. The woman knows which mobile phone she wants. 

T

T

FF

T

F

Read the advertisement in Activity 6 and answer the questions. 1. How can you send a postcard from your mobile phone?

2. What will Mobycard do with your photo?

Send a photo and a message to Mobycard.

It will print the photo.

3. What will Mobycard do with your message?

4. What will your friend receive?

It will put the message on the back of the picture.

My friend will receive a postcard.

Complete the passage with the correct form of the phrases in the box.come on; pick up; save one's life; take a photo; turn on I saw a beautiful plant in the countryside near my home. I didn't know what (1)_________ plant it was. I decided to (2)____________ of it and look it up when I got home. I (3)_________my camera and pressed the button.

kind oftake a photo

picked up

Nothing happened. The green light didn't (4)_________. Oh dear! I thought my camera was broken. In fact, the camera was fine. I forgot I turned it off not long ago. When I (5)_______ it ____, it worked.When I got home, I found out that the plant was very dangerous and it could kill me. I'm happy I didn't touch it. The photo (6)_____________ because now I know I mustn't touch that beautiful plant.

come on

turned on

saved my life

Internet café shopInternet café shop

Who uses Internet cafes?When did the first one open?Where did it open?How many are there now?

Work in groups . Write instructions for how to do one of the following :Making and sending an e-card Finding out about new information Using a mobile phone 1) What will you choose ?2) What kind of instructions do you need to write ? Do you need pictures ?

Plan and write your instructions .1) Decide what order to put them in .2) Write your sentences .3) Draw pictures to make the instructions easy to follow .

制作 : 张佳望

1. Conclusion2. Wb. Ex. 7 , 8 , 9 ,10&111. Conclusion2. Wb. Ex. 7 , 8 , 9 ,10&11