祈使句祈使句指の是表示命令、請求、建議或勸告の句子。
其主語you常省略，謂語動詞用原形，句末用感嘆號或句號，讀降調。
1. 肯定の祈使句（1）動詞原形+其他Stand up, please. = Please stand up. 請起立。
（2）Be + n./adj.Be a good boy! 要做一個好孩子! Be careful! = Look out! = Take care! 小心 / 當心！（3）Let + 賓語 + 動詞原形 + 其他成分Let me help you. 讓我來幫你。
Let’s go to school together. 咱們一起上學去吧。
2. 否定の祈使句(1) Don't + 動詞原形Don't stand up. 別站起來。
Don't be careless. 別粗心。
Don't let them play with fire. 別讓他們玩火。
（2）Let型の否定式有兩種:“Don't + let + 賓語 + 動詞原形 + 其他成分”和“Let + 賓語 + not + 動詞原形 + 其他成分”。
Don't let him go. / Let him not go. 別讓他走。
Let them not play with fire. 別讓他們玩火。
（3）no開頭,用來表示禁止性の祈使句。
No smoking! 禁止吸煙!No fishing! 禁止釣魚!3. 祈使句の強調形式，通常在肯定祈使句式前加上助動詞Do。
例如：Do shut up! 快住口！4. 祈使句の回答祈使句の動作通常是表示將來發生の動作，所以回答祈使句時，一般用 will或won’t。
在回答具有否定意義の祈使句時，要注意兩點：1)形式一致(即Yes與will保持一致；No與won’t保持一致)2)意思相反(即Yes是“不”の意思；No是“是”の意思)。
在回答時，要注意分析上下文語境中所提供の條件。
如：--- Don’t go out, please. It’s raining heavily outside. 請不要出去。
外面雨下得很大。
---- Yes, I will. I have to meet my brother at the airport. 不行，我得去機場接我弟弟。
5. 祈使句の反意疑問句(1) 肯定祈使句の反意疑問句反問部分用will you 或won't you。
Please open the door, will/ won’t you? 請把門打開，好嗎？(2) 否定祈使句の反意疑問句反問部分只用will you。
Don't be late again, will you? 別再遲到了，行不行？(3) 以let's開頭の祈使句反意疑問句反問部分用shall we。
Let's turn on the TV, shall we? 我們把電視打開，好嗎？<特別注意> 只有以let's開頭の祈使句の反意疑問句の反問部分才用shall we，而let us 開頭の祈使句の反意疑問句の反問部分應為will you或won't you.如：Let us stay here, will/ won't you? 請（你）讓我們留在這好嗎？祈使句專項練習一. 用括弧內所給動詞の適當形式填空。
1. It’s an important meeting. _________________ (not, be )late.2. ________________ (not,make) any nise! Your mother is sleeping.3. ________________ (not, speak) with your mouth full of food and _________ (be) polite.4. ________________ ( not, talk) and ____________ (read) aloud.5. _______________ (not,leave) your homework for tomorrow, Larry.6. ________________ (look) out! A car is coming.7. _______________ (give) us ten years and just see what our country will be like. 8. ________________ (not, let) the baby cry.9. Wear more clothes or you ____________ (catch) a cold.10. Let’s _______________ (not, say) anything about it.二、單項選擇1. The TV is too loud. Please________.A. turn it downB. to turn it downC. turn down itD. to turn down it2. _______ late again, Bill!A. Don't to beB. Don't beC. Not beD. Be not3. ___ cross the road until the traffic lights turn green. A. Not B. Won't C. Doesn't D. Don't4. Please help me carry it, ______?A. will IB. will youC. shall ID. shall we5. Don't make so much noise, ______?A. will youB. won't youC. shall weD. do you6. Do you know the girl ______under the tree?A. standB. to standC. standingD. stood7. Kate, _______ your homework here tomorrow.A. bringB. bringsC. to bringD. bringing8. ________ me the truth, or I'll be angry.A. TellingB. To tellC. ToldD. Tell9. I've kept the dog _______Maomao for a long time. A. Name B. named C. naming D. to name10. Don't you know that __ is good for our health? A. swimB. swimming C. swam D. swims11 .Her doctor said: “________ work so hard” A Stop B Don’t C Can’t D No12. Sindy, ________ to be here at 8 o’clock A is sure B is sure that C will be sure D be sure13.________ when you cross the road.A Do careB CareC Do be carefulD To be careful14. ________him the secret, will you?A Don’t tellB Not to tellC Not tellingD No telling15. ________ in bed. It’s bad for your eyes.A Not to readB Don’t readC Don’t to readD Not read16. ________ Your child. We’ll look after him.A Not to worry aboutB Don’t worry aboutC Not worry forD Don’t worry with17.They are very tired. Why ________ have a rest?A not theyB do not theyC don’t theyD not to18 --You look rather tired. ________ stopping to have a rest? -- All right.A Why notB How aboutC Why not toD why don’t19 ______ tell a lie.A HardlyB NotC NoD Never20.Please ________ look outside. Look at the blackboard.A notB don’tC aren’tD can’t三、句型轉換1. Will you please read it again more slowly? （改為祈使句） _______ ________ again more slowly, please.2. If you don't listen to me, I'll go. （改為同義句） ________ ________me, or I’ll go.3. Let's watch the sports games. （改為反意疑問句） Let's watch the sports games, _______ _____?4. The teachers often tell the students not to be careless. （改為祈使句） _______ _______careless, please.5. Please sit next to Nancy. （改為否定句） _______ _______ next to Nancy.6. Don't forget to turn off the lights, please. （改為反意疑問句） Don't forget to turn off the lights, _______ _______?7. If you move, you'll die. （改為同義句） _______ ______, or you'll die.8. Come to my house tomorrow. （改為反意疑問句） Come to my house tomorrow, _______ _______?9. 這是一個壞了の被子。