If 引导的一般条件状语从句--------By the teacher: Jerry Zhang条件状语从句概念：在复合句中，由从句表示的状语叫做状语从句。
它可以用来修饰主语中的动词.形容词.副词等。
根据它表达的意思，状语从句可以分为时间状语从句，地点状语从句，条件状语从句，比较状语从句，目的状语从句，结果状语从句和让步状语从句等。
由连接词if或unless引导的状语从句叫做条件状语从句。
（注意：在含有条件状语从句的复合句中，如果主句是一般将来时态，从句要用一般现在时[主将从现原则]经典语句：If it doesn't rain tomorrow, we will go to the zoo. If you open the door，I will come in.if 引导的条件状语从句主句用一般将来时，if 从句用一般过去时。
We will go to the park if it is fine tomorrow.如果明天天好的话我们就去公园。
We will go traveling if we have time tomorrow.如果明天我们有时间我们就去旅行。
主句祈使句，if 从句用一般现在时。
Please call me if you need help. 如果你需要帮助请打电话给我。
Sing a song if you feel happy. 如果感到快乐就唱首歌吧！主句含有情态动词，if 从句用一般现在时。
You can make a lot of money if you run a company.如果你经营一家公司的话你会装很多钱。
You can get number one if you study hard. 如果你努力学习你就可以得第一。
—Mary, what about going boating if it doesn’t rain? 玛丽，如果明天不下雨，我们就划船好吗？—Good idea. 好主意。
Unit5练习题：单词1. If you wear your j___________ to school, the teacher won’t let you in.2. If you bring food to school, the teacher will t_________ it away.3. If you are on duty, you must c____________ up the classroom.4. The f__________ in the garden smells nice.5. I want to have a birthday party, please help me o___________ it.词的适当形式填空1. If you wear jeans, we ____________ (not let you in.2. Yao Ming is one of the most famous basketball ___________(play in the world.3. Mr Black enjoys __________ to many places of interest.4. If you go to the party, you ______________ (have a great time.5. Wang Lin did very ____________ (bad in 100-meter race.6. Tom says he _________ (play football at ten yesterday morning.7. If he ___________ (come tomorrow, I ____________(call.8. What _______ you _______ (do if you ________ (be A teacher?9. While he _____________ (watch TV yesterday, I __________ (do my homework.10. Look at the clouds. It _________ (rain.11. Kate usually __________ (watch TV on Sundays.12. Listen! Who ___________ (sing in the next room?13. They ___________ (get to Shanghai two days ago.14. If it __________ (be fine next Sunday, we _________ (help the farmers pick apples.15. How soon ________ you ________ (finish the work?16. Let me ________(tell you _______ (say it like this.17. Don’t make any noise. The baby ________- (sleep now.18. It _________ (take me half an hour __________(learn this text by myself yesterday.19. He with his friend ________ (go to help Grandma Li three times a week.20. They are famous ____________ (agent.21. My mother is watering these _____________ (flower.22. He has a lot of ___________ (chance to join the team.23. He is _________ (explain the problem to me.24. Who can tell me the reasons ___________(against becoming a professional football player?25. If you _________(stay at home tomorrow, you’ll see him.26. If you drive to Shanghai next week, your parents______________(be angry.27. If he ___________(ride his bike to go to school tomorrow, he will be late.28. If it ____________ (not rain tomorrow, we will meet you.29. If you ____________ (not help me, I won’t let you come in.30. Do you know what _________-(happen inten years.31. There __________ (be a speech by our headmaster tomorrow afternoon in our school.32. The girl ___________ (shop when I came in.33. The boy ___________(climb the hill at this time yesterday.根据括号内的要求，改写下列各句，每空一词。
1. Run and shout at the party.（改为否定句） _______ run_______ shout at the party.2. I’ll go to your birthday party if I’m free.（对划线部分提问）_______ will you ________ if you are free?3. Can you mend your bike?（同义句）________ you _________ ______ mend your bike?4. They’ll ask you some questions.（一般疑问句）_______ they ask you ________ questions?5. If I’m a teacher, ___________________________（完成句子）6. If he doesn’t help me, I won’t buy the car,（改为简单句）I won’t buy thecar___________ __________ help.7. He will go home with his father. I think.（合并为一句） _________________________________.7. He can finish the work. He ______ ______ ______ the work.8. He was watching TV when I got home.（提问）选用方框中所给词的正确形势填空take away, make a living, all the time, be able to, too much1. If you drink _________________, you won’t drive a car.2. He ______________ his book from me yesterday.3. He _____________ by singing for others.4. If you study harder, you _______________ pass the exam.5. They didn’t get out. They were watching TV_______________.翻译下列句子1.如果我明天有时间，我就和你一起玩。
If I ___ ____ tomorrow, I _____ _____ with you.2.今天晚上如果有足球赛，他们就不上学了。
If there ___ a football match, they ______ _______to school.3.张鹏不知道今天下午是否玩电脑。