English verb conjugation
MAY TIFF

Regular verb: tiff - tiffed - tiffed

Affirmation

Simple form	V-ing form
I may tiff you may tiff he may tiff we may tiff you may tiff they may tiff	I may be tiffing you may be tiffing he may be tiffing we may be tiffing you may be tiffing they may be tiffing
Perfect	V-ing perfect
I may have tiffed you may have tiffed he may have tiffed we may have tiffed you may have tiffed they may have tiffed	I may have been tiffing you may have been tiffing he may have been tiffing we may have been tiffing you may have been tiffing they may have been tiffing

Negation

Simple form	V-ing form
I may not tiff you may not tiff he may not tiff we may not tiff you may not tiff they may not tiff	I may not be tiffing you may not be tiffing he may not be tiffing we may not be tiffing you may not be tiffing they may not be tiffing
Perfect	V-ing perfect
I may not have tiffed you may not have tiffed he may not have tiffed we may not have tiffed you may not have tiffed they may not have tiffed	I may not have been tiffing you may not have been tiffing he may not have been tiffing we may not have been tiffing you may not have been tiffing they may not have been tiffing

Interrogative form

Simple form	V-ing form
may I tiff? may you tiff? may he tiff? may we tiff? may you tiff? may they tiff?	may I be tiffing? may you be tiffing? may he be tiffing? may we be tiffing? may you be tiffing? may they be tiffing?
Perfect	V-ing perfect
may I have tiffed? may you have tiffed? may he have tiffed? may we have tiffed? may you have tiffed? may they have tiffed?	may I have been tiffing? may you have been tiffing? may he have been tiffing? may we have been tiffing? may you have been tiffing? may they have been tiffing?

Interro-negative form

Simple form	V-ing form
may I not tiff? may you not tiff? may he not tiff? may we not tiff? may you not tiff? may they not tiff?	may I not be tiffing? may you not be tiffing? may he not be tiffing? may we not be tiffing? may you not be tiffing? may they not be tiffing?
Perfect	V-ing perfect
may I not have tiffed? may you not have tiffed? may he not have tiffed? may we not have tiffed? may you not have tiffed? may they not have tiffed?	may I not have been tiffing? may you not have been tiffing? may he not have been tiffing? may we not have been tiffing? may you not have been tiffing? may they not have been tiffing?