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1、一般疑问句和否定句的构成一般疑问句和否定句的构成 1. 一般疑问句的构成 1)当句中是否含有be动词时，把be动词提到句首，am 变成are; I 变成you, we 变you; 在句末加上问号。例如 I am Mary(变成一般疑问句) Are you Mary? We are students.(变成一般疑问句) Are you students? He is her father. (变成一般疑问句) Is he her father? They are girls. (变成一般疑问句) Are they girls? 2) 当句中没有be动词时，出现行为动词，如果行为动词为原形，就在句
2、首加Do,I 变you, we变you,句末加上问号。例如 I have a baseball. (变成一般疑问句) Do you have a baseball? We have a ball. (变成一般疑问句) Do you have a ball? 如果行为动词加了s(即为第三人称单数)时,就在句首加Does,动词还原为原形，句末加问号。如： She has a doll. (变成一般疑问句) Does she have a doll? Lucy likes the dog. (变成一般疑问句) Does Lucy like the dog? 否定句的构成 1)当句中是否含有be动词时
3、，在be 动词后加上not,写为 am not, is not =isnt,are not=arent 例如 I am Mary(变成否定句) I am not Mary. We are students.(变成否定句) We arent students, He is her father. (变成否定句) He is not her father. They are girls. (变成否定句) They arent girls. 2）当句中没有be动词时，出现行为动词， 如果行为动词为原形，在行为动词前加上dont,其余不变。例如 I have a baseball. (变成否定句) I dont have a baseball. We have a ball. (变成否定句) We dont have a ball. 如果行为动词加了s(即为第三人称单数)时,在行为动词前加上doesnt，行为动词还原为原形，如： She has a doll. (变成否定句) She doesnt have a doll. Lucy likes the dog. (变成否定句) Lucy doesnt like the dog.
