may thicken
Regular verb: thicken - thickened- thickened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may thicken
you may thicken
she may thicken
we may thicken
you may thicken
they may thicken 	I may be thickening
you may be thickening
she may be thickening
we may be thickening
you may be thickening
they may be thickening	I may have thickened
you may have thickened
she may have thickened
we may have thickened
you may have thickened
they may have thickened	I may have been thickening
you may have been thickening
she may have been thickening
we may have been thickening
you may have been thickening
they may have been thickening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't thicken
you mayn't thicken
she mayn't thicken
we mayn't thicken
you mayn't thicken
they mayn't thicken 	I mayn't be thickening
you mayn't be thickening
she mayn't be thickening
we mayn't be thickening
you mayn't be thickening
they mayn't be thickening	I mayn't have thickened
you mayn't have thickened
she mayn't have thickened
we mayn't have thickened
you mayn't have thickened
they mayn't have thickened	I mayn't have been thickening
you mayn't have been thickening
she mayn't have been thickening
we mayn't have been thickening
you mayn't have been thickening
they mayn't have been thickening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I thicken?
may you thicken?
may she thicken?
may we thicken?
may you thicken?
may they thicken? 	may I be thickening?
may you be thickening?
may she be thickening?
may we be thickening?
may you be thickening?
may they be thickening? 	may I have thickened?
may you have thickened?
may she have thickened?
may we have thickened?
may you have thickened?
may they have thickened? 	may I have been thickening?
may you have been thickening?
may she have been thickening?
may we have been thickening?
may you have been thickening?
may they have been thickening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I thicken?
mayn't you thicken?
mayn't she thicken?
mayn't we thicken?
mayn't you thicken?
mayn't they thicken? 	mayn't I be thickening?
mayn't you be thickening?
mayn't she be thickening?
mayn't we be thickening?
mayn't you be thickening?
mayn't they be thickening? 	mayn't I have thickened?
mayn't you have thickened?
mayn't she have thickened?
mayn't we have thickened?
mayn't you have thickened?
mayn't they have thickened? 	mayn't I have been thickening?
mayn't you have been thickening?
mayn't she have been thickening?
mayn't we have been thickening?
mayn't you have been thickening?
mayn't they have been thickening?