Helping Verb

ลำดับที่	Helping Verb	รูปปฏิเสธ			รูปย่อปฏิเสธ
1	is	is	not		isn’t
2	am	am	not		-
3	are	are	not		aren’t
4	was	was	not		wasn’t
5	were	were	not		weren’t
6	do	do	not		don’t
7	does	does	not		doesn’t
8	did	did	not		didn’t
9	has	has	not		hasn’t
10	have	have	not		haven’t
11	had	had	not		hadn’t
12	can	can	not		can’t
13	could	could	not		couldn’t
14	may	may	not		-
15	might	might	not		-
16	will	will	not		won’t
17	would	would	not		wouldn’t
18	shall	shall	not		shan’t
19	should	should	not		shouldn’t
20	ought to	ought not to			-
21	need	need		not	needn’t
22	must	must		not	mustn’t
23	dare	dare		not	-
24	use to	use not to			-