1、当 must be用来表示推测,有“一定”的含义时,否定式要用 can not.例 5 You must say something at the mecting.You neednt say anything at the mecting.析:当“must+行为动词”用来表示“必须”的含义时,其否定式可用 neednt 或 mustnt 表示“不需要”,“不必”,语气委婉,must not 表示“禁止”,“千万别”语气生硬。例 6 You may come in now.You mustnt come in now.析:may作为情态动词表示“可以”时,其否定式用 must not,而不用
2、may not.例 7 He may watch TV.He mustnt watch TV.注意:(1)见到 some 变否定句时,要换成 any.例 1 I eat some apples.否定句 I dont eat any apples.例 2 He has some books.否定句 He doesnt have any books.例 3 He does his home work.否定句 He doesnt do his home work.(2)见到 and 变否定句时,要换成 or.例 1 There is some air and water on the moon.否定
3、句 There isnt any air or water on the moon.例 2 He has some brothers and sisters.否定句 He hasnt any brothers or sisters.例 3 He eats apples and oranges.否定句 He doesnt eat apples or oranges.(3)见到 too和 also变否定句时,要换成 either.例 1Tom goes to school too.否定句 Tom doesnt go to school either.too和 also用于肯定句中时,否定句中用 e
4、ither替换。(4 见到 already变否定句时,要换成 yet。例 1 He has had supper already.He hasnt had supper yet.随着对谓语动词的否定,某些副词也要作相应的变动。一般现在时精炼 一 将下列句子变否定句。例 1 I am a boy.例 2 You are a girl.例 3 He is a teacher.例 4 Jim is English.例 5 These are bikes.例 6 Those are maps.例 7 They are buses.例 8 We are Chinese.二 将下列句子变否定句。例 1 I
5、m a boy.例 2 Youre a girl.例 3 Hes a teacher.例 4 Its a pen.例 5 These are some bikes.例 6 Those are maps and pencils.例 7 Theyre some buses and cars.例 8 She is your teacher.三 将下列句子变疑问句。例 1 I am a boy.例 2 You are a girl.例 3 He is my teacher.例 4 Jim is our English.例 5 These are some bikes.例 6 Those are my
6、maps.例 7 They are some buses.例 8 We are Chinese.四 将下列句子变成疑问句。例 1 Im a boy.例 2 Youre a girl.例 3 Hes my teacher.例 4 Its a pen.例 5 These are some bikes.例 6 Those are maps and pencils.例 7 Theyre some buses and cars.例 8 She is your teacher.五 将下列句子变否定句。例 1 I teach English.例 2 They go to school.例 3 We sing
7、 a song.例 4 He spells it.例 5 She goes to school.例 6 He does his homework.例 7 They do their homework.例 8 I do my homework.六 将下列句子变否定句。例 1 He teaches my English.例 2 They speak English and French.例 3 We eat some apples.例 4 Jim spells it.例 5 She goes to our school.例 6 He does some homework.例 7 They do t
8、heir homework.例 8 We do some homework.七 将下列句子变疑问句。例 1 I teach English.例 2 They go to school.例 3 We sing a song.例 4 He spells it.例 5 She goes to school.例 6 He does his homework.例 7 They does their homework.例 8 I do my homework.八 将下列句子变疑问句。例 1 He teaches my English.例 2 They speak English and French.例
9、3 We eat some apples.例 4 Jim spells it.例 5 She goes to our school.例 6 He does some homework.例 7 They do their homework.例 8 We do some homework.九 将下列句子变否定句。例 1 I can dance.例 2 They can speak English.例 3He must go home.例 4 He must be on the playground.例 5 You must say something at the mecting.例 6 You
10、may come in now.例 7 He may watch TV.例 8 We need speak English.十 将下列句子变否定句。例 1 I can dance and sing.例 2 They can speak some English.例 3You must go home.例 4 They must be on the playground.例 5He must say something at the mecting.例 6 Jim may come in now.例 7 They may watch TV.例 8 We need speak English an
11、d English.十一 将下列句子变疑问句。例 1 I can dance.例 2 They can speak English.例 3He must go home.例 4 He must be on the playground.例 5 You must say something at the mecting.例 6 You may come in now.例 7 He may watch TV.例 8 We need speak English.十二 将下列句子疑问定句。例 1 I can dance and sing.例 2 They can speak some English.
12、例 3You must go home.例 4 They must be on the playground.例 5He must say something at the mecting.例 6 You may come in now.例 7 They may watch TV.例 8 We need speak English and English.十三 写出下列动词的第三人称单数形式。1 go 2 spell 3 speak 4like 5teach 6 Be 7 are 8 study 9 have 10 do 十四 将下列名词变成复数。1 apple 2 orange 3 map
13、4 pen 5 pencil 6 desk 7 dog 8 tomato 9 photo 10 knife 十五 将下列名词变成复数。1 man 2 woman 3 child 4 person 5people 6 fish 7 sheep 8 deer 9 foot 10 tooth 十六 写出人称代词主格。十七 写出人称代词宾格。十八 写出形容词性物主代词。十九 肯定回答和否定回答。1 Is this your book?2 Are you a teacher?3 Is there any water in the cup?4 Are there any books or pens on the desk?5 Does he do his homework?6 Does Jim go to school?7 Do you like your English teacher?8 Do they study English?9 Can you dance?10 May he go home?11Must you come in time.12 Need I finish the
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