祈使句的结构及用法(附练习题与答案)

• 4. No+/名词以上结构表示禁止,多用于公共场合的标牌或警示语。
• 例如:No littering.禁止乱扔垃圾。
•
No photo.禁止拍照。
• 注意:为了加强祈使句的语气,我们通常在祈使句的动词原形前加上助动词do,此时译为“一定,务必”。例 如:Do lock the door.务必要锁上门。Do write carefully. 一定要仔细写。巧记口诀祈使句巧记口诀祈使句 无主语,主语you常省去;动词原形在句首,加上please较客气。变为否定很容易,句首don't莫忘记。
• 3. Let型(1)肯定句: Let+宾语+动词原形+其他成分。
• 例如:Let me help you.让我来帮你。
• (2)否定句:don't+let+动词原形+其他成分。或Let+宾语+not+动词原形+其他成分。
• 例如:don't let her cross the street alone.= Let her not cross the street alone.不要让她单独过马路。
祈使句
• 祈使句的种类 • 1. Do型 • (1)肯定句:动词原形(+宾语）+其他成分。 • 例如:Open the door.开门。 • Please have a seat here.请这边坐。 • (2)否定句:don't+动词原形(+宾语）+其他成分。 • 例如:don't watch TV. 不要看电视。 • 2. Be型 • (1)肯定句:Be+表语（名词或形容词）+其他成分。 • 例如: Be a good boy!要做一个好孩子！Be quite, please!请安静！ • (2)否定句:don't be+表语。例如:don't be late.不要迟到。
• 三、句型转换。 • 1. Put your hands out of the window. （改为否定句） • ______________________________ • 2. Watch TV at night.（改为否定句） • ______________________________ • 3. don't read books in the bed. （改为肯定句 • ）______________________________ • 4. don't do it like that! （改为肯定句） • ______________________________ • 5. don't smoke.（改为以no开头的同义句） • _____________________________ • 6. Let him not swim in the river.（改为同义句） • _____________________________ • 7. don't make noise.（改为同义句） • ______________________________
• ( )8. _______ your hands before eating food. • A . Wa s h i n g B . Wa s h C . To wa s h • ( )9. Please _______ worry. • A. don't to B. don't C. don't be • ( )10. Let me _______ the teacher to help answer the question. • A. ask B. to ask C. asks • ( )11. Please give _______. • A. Sally it B. Sally to it C. it to Sally • ( )12. _______ food. • A. don't B. No C. / • ( )13. _______ talking! Keep quiet in the library. • A. don't B. No C. Not • ( )14. _______ run and jump after dinner. • A. Do B. don't C. can't • ( )15. Let him _______ a rest. • A.to have B. have to C. have
• 一、对应练习选择最佳答案。 • ( )1. Don't _______ late for school! • A. be B. is C. am • ( )2. _______ quick! • A. Be B. Let C. Do • ( )3. Please give _______ a cup of coffee. • A. she B. he C. him • ( )4. Let me _______ , please. • A. go home B. to go home C. to go to home • ( )5. Come here and _______ it to me. • A. to take B. take C. takes
• 二、选择最佳答案填空。 • ( )1. _______ kind to the poor. • A . B e B . To b e C . L e t • ( )2. Let's _______ together. • A. go home B. to go home C. going home • ( )3. Please don't _______ late _______ the meeting. • A. /;to B. are;for C. be;for • ( )4. It's cold outside. don't _______ the door, please. • A. to open B. opens C. open • ( )5. Let's go and _______. • A. take to some photos B. to take some photos C. take some photos • ( )6. I can't find my bike. Let me _______. • A. go and ask her B. go and ask hers C. go and ask she • ( )7. _______ believe him. He often tells lies. • A . N o t B . d o n 't C . To n o t