一般现在时 (2)

1、一般现在时一、定义与讲解一般现在时：表示经常性的事情，经常性的动作或一般性事实。时间状语：often 经常，usually通常，always 总是，every每个，sometimes 有时，at 在几点钟只有在第三人称单数用动词的“三单变化”，其他用动词的原形。三单变化：1.多数在动词后s play plays like likes（1）直接在动词词尾加-s.ask-asks work-works get-gets stay-stays（2）以字母s, x, ch, sh或o结尾的动词，在词尾直接加-es.watch-watches wish-wishes fix-fixes do-does

2、go-goes pass-passes（3）以“辅音字母加 - y”结尾的动词，要先变y为i再加-es.try-tries study-studies cry-cries fly-flies2.不规则变化：be- is are have-has二、一般现在时用法1. 表示经常性，习惯性,永久性的动作或存在的状态.通常与副词sometimes, often, usually, always, every day (year, month ), once (twice, three times) a day,等时间状语连用。They usually go to school by bike.I t

3、ake the medicine three times a day.She helps her mother once a week.Marys father is a policeman.There are 50 students in my class.2. 表示客观真理，科学原理，自然现象，等客观事实或格言，谚语等。 The sun rises in the east and sets in the west every day.The man who has never been to the Great Wall is not a real man. Tomorrow is Tue

4、sday.三、一般现在时的句子转换：（1）当句子中有be动词或情态动词时，则把be动词或情态动词(can,could等等)提到主语的前面变成疑问句;在be动词或情态动词后面加not变成否定句.例：陈述句：She is a student. 疑问句 Is she a student? 否定句 She is not a student.陈述句：I can swim.疑问句 Can you swim否定句 I can not swim.（2） 当句子中即没有be动词，也没有情态动词时， 则在主语前加助动词do (you,以及复数), does（单数 she,he,it）变成问句；在主语后谓语动词前加

5、助动词dont（I,you,以及复数), doesnt（单数she,he,it）变成否定句，助动词后的动词要变成动词原形。例：陈述句：We get up at 7:00 every morning.疑问句Do you get up at 7:00 every morning?否定句We dont get up at 7:00 every morning.陈述句：She has a little brother.疑问句 Does she have a little brother?否定句 She doesnt have a little brother三、按照要求改写句子1. Daniel wa

6、tches TV every evening.(改为否定句_2. I do my homework every day.(改为一般疑问句，并作否定回答)_3. She likes milk.(改为一般疑问句并作肯定回答)_4. Amy likes playing computer games.(改为一般疑问句，并作否定回答)_5. We go to school every morning.(改为否定句_6. He speaks English very well.(改为否定句)_7. I like taking photos in the park.(对划线部分提问)_8. John com

7、es from Canada.(对划线部分提问)_9. She is always a good student.(改为一般疑问句，作否定回答)_10. Simon and Daniel like going skating.(改为否定句)_11. Do you often play football after school? (肯定回答) _12. I have many books. （改为否定句）_13. Gao Shan's sister likes playing table tennis.（改为否定句）_14. She lives in a small town near

8、 New York. （改为一般疑问句）_15. I watch TV every day. （改为一般疑问句）_16. David has got a goal. （改为一般疑问句）_17. We have four lessons.（改为否定句）_18. Nancy doesn't run fast. （改为肯定句）_19. My dog runs fast. 否定句：_一般疑问句：_20. Mike has two letters for him.一般疑问句：_ 否定句：_21. I usually play football on Friday afternoon.否定句: _

9、一般疑问句: _划线提问_22. Sun Yang usually washes some clothes on Saturday.否定句: _ 一般疑问句: _划线提问: _23. Mingming usually waters the flowers every day.否定句: _ 一般疑问句: _划线提问 _24. Tom does his homework at home.否定句: _ 一般疑问句: _划线提问_ Daniel doesn't watch TV every evening.2. Do you do your homework every day? No,I d

10、on't.3. Does she like milk? Yes,she does.4. Does Amy like playing computer games? No,she doesn't.5. We don't go to school every morning.6. He doesn't speak English very well.7. I like taking photos in the park. What do you like doing in the park?8. John comes from Canada.Where does J

11、ohn come from?9. Is she always a good student? No,she isn't.10. Simon and Daniel don't like going skating.11. Yes,I do.12. I don't have many books.13. Gao Shan's sister doesn't like playing table tennis.14. Does she live in a small town near New York?15. Do you watch TV every day

12、?16. Has David got a goal?17. We don't have four lessons.18. Nancy runs fast.19. My dog doesn't run fast.Does your dog run fast?20. Does Mike have two letters for him? Mike doesn't have two letters for him.21. I don't usually play football on Friday afternoon.Do you usually play football on Friday afternoon?What do you usually do on Friday afternoon?22. Sun Yang doesn't usually wash any clothes on Saturday.Does Sun Yang usually wash any clothes on SaturdayWhat does Sun Yang usually do on Saturday?23. Mingming doesn't usually water the flowers