may muscle
Regular verb: muscle - muscled- muscled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may muscle
you may muscle
he may muscle
we may muscle
you may muscle
they may muscle 	I may be muscling
you may be muscling
he may be muscling
we may be muscling
you may be muscling
they may be muscling	I may have muscled
you may have muscled
he may have muscled
we may have muscled
you may have muscled
they may have muscled	I may have been muscling
you may have been muscling
he may have been muscling
we may have been muscling
you may have been muscling
they may have been muscling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't muscle
you mayn't muscle
he mayn't muscle
we mayn't muscle
you mayn't muscle
they mayn't muscle 	I mayn't be muscling
you mayn't be muscling
he mayn't be muscling
we mayn't be muscling
you mayn't be muscling
they mayn't be muscling	I mayn't have muscled
you mayn't have muscled
he mayn't have muscled
we mayn't have muscled
you mayn't have muscled
they mayn't have muscled	I mayn't have been muscling
you mayn't have been muscling
he mayn't have been muscling
we mayn't have been muscling
you mayn't have been muscling
they mayn't have been muscling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I muscle?
may you muscle?
may he muscle?
may we muscle?
may you muscle?
may they muscle? 	may I be muscling?
may you be muscling?
may he be muscling?
may we be muscling?
may you be muscling?
may they be muscling? 	may I have muscled?
may you have muscled?
may he have muscled?
may we have muscled?
may you have muscled?
may they have muscled? 	may I have been muscling?
may you have been muscling?
may he have been muscling?
may we have been muscling?
may you have been muscling?
may they have been muscling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I muscle?
mayn't you muscle?
mayn't he muscle?
mayn't we muscle?
mayn't you muscle?
mayn't they muscle? 	mayn't I be muscling?
mayn't you be muscling?
mayn't he be muscling?
mayn't we be muscling?
mayn't you be muscling?
mayn't they be muscling? 	mayn't I have muscled?
mayn't you have muscled?
mayn't he have muscled?
mayn't we have muscled?
mayn't you have muscled?
mayn't they have muscled? 	mayn't I have been muscling?
mayn't you have been muscling?
mayn't he have been muscling?
mayn't we have been muscling?
mayn't you have been muscling?
mayn't they have been muscling?