English verb conjugation
MAY INVALIDATE

Regular verb: invalidate - invalidated - invalidated

Affirmation

Simple form	V-ing form
I may invalidate you may invalidate she may invalidate we may invalidate you may invalidate they may invalidate	I may be invalidating you may be invalidating she 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 she 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 she 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 she 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 she 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 she 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 she 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 she invalidate? may we invalidate? may you invalidate? may they invalidate?	may I be invalidating? may you be invalidating? may she 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 she 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 she 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 she 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 she 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 she 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 she have been invalidating? mayn't we have been invalidating? mayn't you have been invalidating? mayn't they have been invalidating?