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 may not thicken
you may not thicken
she may not thicken
we may not thicken
you may not thicken
they may not thicken 	I may not be thickening
you may not be thickening
she may not be thickening
we may not be thickening
you may not be thickening
they may not be thickening	I may not have thickened
you may not have thickened
she may not have thickened
we may not have thickened
you may not have thickened
they may not have thickened	I may not have been thickening
you may not have been thickening
she may not have been thickening
we may not have been thickening
you may not have been thickening
they may not 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 	
may I not thicken?
may you not thicken?
may she not thicken?
may we not thicken?
may you not thicken?
may they not thicken? 	may I not be thickening?
may you not be thickening?
may she not be thickening?
may we not be thickening?
may you not be thickening?
may they not be thickening? 	may I not have thickened?
may you not have thickened?
may she not have thickened?
may we not have thickened?
may you not have thickened?
may they not have thickened? 	may I not have been thickening?
may you not have been thickening?
may she not have been thickening?
may we not have been thickening?
may you not have been thickening?
may they not have been thickening?