may suffocate
Regular verb: suffocate - suffocated- suffocated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may suffocate
you may suffocate
he may suffocate
we may suffocate
you may suffocate
they may suffocate 	I may be suffocating
you may be suffocating
he may be suffocating
we may be suffocating
you may be suffocating
they may be suffocating	I may have suffocated
you may have suffocated
he may have suffocated
we may have suffocated
you may have suffocated
they may have suffocated	I may have been suffocating
you may have been suffocating
he may have been suffocating
we may have been suffocating
you may have been suffocating
they may have been suffocating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't suffocate
you mayn't suffocate
he mayn't suffocate
we mayn't suffocate
you mayn't suffocate
they mayn't suffocate 	I mayn't be suffocating
you mayn't be suffocating
he mayn't be suffocating
we mayn't be suffocating
you mayn't be suffocating
they mayn't be suffocating	I mayn't have suffocated
you mayn't have suffocated
he mayn't have suffocated
we mayn't have suffocated
you mayn't have suffocated
they mayn't have suffocated	I mayn't have been suffocating
you mayn't have been suffocating
he mayn't have been suffocating
we mayn't have been suffocating
you mayn't have been suffocating
they mayn't have been suffocating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I suffocate?
may you suffocate?
may he suffocate?
may we suffocate?
may you suffocate?
may they suffocate? 	may I be suffocating?
may you be suffocating?
may he be suffocating?
may we be suffocating?
may you be suffocating?
may they be suffocating? 	may I have suffocated?
may you have suffocated?
may he have suffocated?
may we have suffocated?
may you have suffocated?
may they have suffocated? 	may I have been suffocating?
may you have been suffocating?
may he have been suffocating?
may we have been suffocating?
may you have been suffocating?
may they have been suffocating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I suffocate?
mayn't you suffocate?
mayn't he suffocate?
mayn't we suffocate?
mayn't you suffocate?
mayn't they suffocate? 	mayn't I be suffocating?
mayn't you be suffocating?
mayn't he be suffocating?
mayn't we be suffocating?
mayn't you be suffocating?
mayn't they be suffocating? 	mayn't I have suffocated?
mayn't you have suffocated?
mayn't he have suffocated?
mayn't we have suffocated?
mayn't you have suffocated?
mayn't they have suffocated? 	mayn't I have been suffocating?
mayn't you have been suffocating?
mayn't he have been suffocating?
mayn't we have been suffocating?
mayn't you have been suffocating?
mayn't they have been suffocating?