may decode
Regular verb: decode - decoded- decoded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may decode
you may decode
he may decode
we may decode
you may decode
they may decode 	I may be decoding
you may be decoding
he may be decoding
we may be decoding
you may be decoding
they may be decoding	I may have decoded
you may have decoded
he may have decoded
we may have decoded
you may have decoded
they may have decoded	I may have been decoding
you may have been decoding
he may have been decoding
we may have been decoding
you may have been decoding
they may have been decoding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't decode
you mayn't decode
he mayn't decode
we mayn't decode
you mayn't decode
they mayn't decode 	I mayn't be decoding
you mayn't be decoding
he mayn't be decoding
we mayn't be decoding
you mayn't be decoding
they mayn't be decoding	I mayn't have decoded
you mayn't have decoded
he mayn't have decoded
we mayn't have decoded
you mayn't have decoded
they mayn't have decoded	I mayn't have been decoding
you mayn't have been decoding
he mayn't have been decoding
we mayn't have been decoding
you mayn't have been decoding
they mayn't have been decoding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I decode?
may you decode?
may he decode?
may we decode?
may you decode?
may they decode? 	may I be decoding?
may you be decoding?
may he be decoding?
may we be decoding?
may you be decoding?
may they be decoding? 	may I have decoded?
may you have decoded?
may he have decoded?
may we have decoded?
may you have decoded?
may they have decoded? 	may I have been decoding?
may you have been decoding?
may he have been decoding?
may we have been decoding?
may you have been decoding?
may they have been decoding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I decode?
mayn't you decode?
mayn't he decode?
mayn't we decode?
mayn't you decode?
mayn't they decode? 	mayn't I be decoding?
mayn't you be decoding?
mayn't he be decoding?
mayn't we be decoding?
mayn't you be decoding?
mayn't they be decoding? 	mayn't I have decoded?
mayn't you have decoded?
mayn't he have decoded?
mayn't we have decoded?
mayn't you have decoded?
mayn't they have decoded? 	mayn't I have been decoding?
mayn't you have been decoding?
mayn't he have been decoding?
mayn't we have been decoding?
mayn't you have been decoding?
mayn't they have been decoding?