English verb conjugation
MAY TOUGH

Regular verb: tough - toughed - toughed

Affirmation

Simple form	V-ing form
I may tough you may tough she may tough we may tough you may tough they may tough	I may be toughing you may be toughing she may be toughing we may be toughing you may be toughing they may be toughing
Perfect	V-ing perfect
I may have toughed you may have toughed she may have toughed we may have toughed you may have toughed they may have toughed	I may have been toughing you may have been toughing she may have been toughing we may have been toughing you may have been toughing they may have been toughing

Negation

Simple form	V-ing form
I mayn't tough you mayn't tough she mayn't tough we mayn't tough you mayn't tough they mayn't tough	I mayn't be toughing you mayn't be toughing she mayn't be toughing we mayn't be toughing you mayn't be toughing they mayn't be toughing
Perfect	V-ing perfect
I mayn't have toughed you mayn't have toughed she mayn't have toughed we mayn't have toughed you mayn't have toughed they mayn't have toughed	I mayn't have been toughing you mayn't have been toughing she mayn't have been toughing we mayn't have been toughing you mayn't have been toughing they mayn't have been toughing

Interrogative form

Simple form	V-ing form
may I tough? may you tough? may she tough? may we tough? may you tough? may they tough?	may I be toughing? may you be toughing? may she be toughing? may we be toughing? may you be toughing? may they be toughing?
Perfect	V-ing perfect
may I have toughed? may you have toughed? may she have toughed? may we have toughed? may you have toughed? may they have toughed?	may I have been toughing? may you have been toughing? may she have been toughing? may we have been toughing? may you have been toughing? may they have been toughing?

Interro-negative form

Simple form	V-ing form
mayn't I tough? mayn't you tough? mayn't she tough? mayn't we tough? mayn't you tough? mayn't they tough?	mayn't I be toughing? mayn't you be toughing? mayn't she be toughing? mayn't we be toughing? mayn't you be toughing? mayn't they be toughing?
Perfect	V-ing perfect
mayn't I have toughed? mayn't you have toughed? mayn't she have toughed? mayn't we have toughed? mayn't you have toughed? mayn't they have toughed?	mayn't I have been toughing? mayn't you have been toughing? mayn't she have been toughing? mayn't we have been toughing? mayn't you have been toughing? mayn't they have been toughing?