may sicken
Regular verb: sicken - sickened- sickened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may sicken
you may sicken
he may sicken
we may sicken
you may sicken
they may sicken 	I may be sickening
you may be sickening
he may be sickening
we may be sickening
you may be sickening
they may be sickening	I may have sickened
you may have sickened
he may have sickened
we may have sickened
you may have sickened
they may have sickened	I may have been sickening
you may have been sickening
he may have been sickening
we may have been sickening
you may have been sickening
they may have been sickening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't sicken
you mayn't sicken
he mayn't sicken
we mayn't sicken
you mayn't sicken
they mayn't sicken 	I mayn't be sickening
you mayn't be sickening
he mayn't be sickening
we mayn't be sickening
you mayn't be sickening
they mayn't be sickening	I mayn't have sickened
you mayn't have sickened
he mayn't have sickened
we mayn't have sickened
you mayn't have sickened
they mayn't have sickened	I mayn't have been sickening
you mayn't have been sickening
he mayn't have been sickening
we mayn't have been sickening
you mayn't have been sickening
they mayn't have been sickening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I sicken?
may you sicken?
may he sicken?
may we sicken?
may you sicken?
may they sicken? 	may I be sickening?
may you be sickening?
may he be sickening?
may we be sickening?
may you be sickening?
may they be sickening? 	may I have sickened?
may you have sickened?
may he have sickened?
may we have sickened?
may you have sickened?
may they have sickened? 	may I have been sickening?
may you have been sickening?
may he have been sickening?
may we have been sickening?
may you have been sickening?
may they have been sickening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I sicken?
mayn't you sicken?
mayn't he sicken?
mayn't we sicken?
mayn't you sicken?
mayn't they sicken? 	mayn't I be sickening?
mayn't you be sickening?
mayn't he be sickening?
mayn't we be sickening?
mayn't you be sickening?
mayn't they be sickening? 	mayn't I have sickened?
mayn't you have sickened?
mayn't he have sickened?
mayn't we have sickened?
mayn't you have sickened?
mayn't they have sickened? 	mayn't I have been sickening?
mayn't you have been sickening?
mayn't he have been sickening?
mayn't we have been sickening?
mayn't you have been sickening?
mayn't they have been sickening?