English verb conjugation
MAY INVALIDATE

Regular verb: invalidate - invalidated - invalidated

Affirmation

Simple form	V-ing form
I may invalidate you may invalidate he may invalidate we may invalidate you may invalidate they may invalidate	I may be invalidating you may be invalidating he may be invalidating we may be invalidating you may be invalidating they may be invalidating
Perfect	V-ing perfect
I may have invalidated you may have invalidated he may have invalidated we may have invalidated you may have invalidated they may have invalidated	I may have been invalidating you may have been invalidating he may have been invalidating we may have been invalidating you may have been invalidating they may have been invalidating

Negation

Simple form	V-ing form
I mayn't invalidate you mayn't invalidate he mayn't invalidate we mayn't invalidate you mayn't invalidate they mayn't invalidate	I mayn't be invalidating you mayn't be invalidating he mayn't be invalidating we mayn't be invalidating you mayn't be invalidating they mayn't be invalidating
Perfect	V-ing perfect
I mayn't have invalidated you mayn't have invalidated he mayn't have invalidated we mayn't have invalidated you mayn't have invalidated they mayn't have invalidated	I mayn't have been invalidating you mayn't have been invalidating he mayn't have been invalidating we mayn't have been invalidating you mayn't have been invalidating they mayn't have been invalidating

Interrogative form

Simple form	V-ing form
may I invalidate? may you invalidate? may he invalidate? may we invalidate? may you invalidate? may they invalidate?	may I be invalidating? may you be invalidating? may he be invalidating? may we be invalidating? may you be invalidating? may they be invalidating?
Perfect	V-ing perfect
may I have invalidated? may you have invalidated? may he have invalidated? may we have invalidated? may you have invalidated? may they have invalidated?	may I have been invalidating? may you have been invalidating? may he have been invalidating? may we have been invalidating? may you have been invalidating? may they have been invalidating?

Interro-negative form

Simple form	V-ing form
mayn't I invalidate? mayn't you invalidate? mayn't he invalidate? mayn't we invalidate? mayn't you invalidate? mayn't they invalidate?	mayn't I be invalidating? mayn't you be invalidating? mayn't he be invalidating? mayn't we be invalidating? mayn't you be invalidating? mayn't they be invalidating?
Perfect	V-ing perfect
mayn't I have invalidated? mayn't you have invalidated? mayn't he have invalidated? mayn't we have invalidated? mayn't you have invalidated? mayn't they have invalidated?	mayn't I have been invalidating? mayn't you have been invalidating? mayn't he have been invalidating? mayn't we have been invalidating? mayn't you have been invalidating? mayn't they have been invalidating?