English verb conjugation
MAY CERTIFICATE

Regular verb: certificate - certificated - certificated

Affirmation

Simple form	V-ing form
I may certificate you may certificate she may certificate we may certificate you may certificate they may certificate	I may be certificating you may be certificating she may be certificating we may be certificating you may be certificating they may be certificating
Perfect	V-ing perfect
I may have certificated you may have certificated she may have certificated we may have certificated you may have certificated they may have certificated	I may have been certificating you may have been certificating she may have been certificating we may have been certificating you may have been certificating they may have been certificating

Negation

Simple form	V-ing form
I mayn't certificate you mayn't certificate she mayn't certificate we mayn't certificate you mayn't certificate they mayn't certificate	I mayn't be certificating you mayn't be certificating she mayn't be certificating we mayn't be certificating you mayn't be certificating they mayn't be certificating
Perfect	V-ing perfect
I mayn't have certificated you mayn't have certificated she mayn't have certificated we mayn't have certificated you mayn't have certificated they mayn't have certificated	I mayn't have been certificating you mayn't have been certificating she mayn't have been certificating we mayn't have been certificating you mayn't have been certificating they mayn't have been certificating

Interrogative form

Simple form	V-ing form
may I certificate? may you certificate? may she certificate? may we certificate? may you certificate? may they certificate?	may I be certificating? may you be certificating? may she be certificating? may we be certificating? may you be certificating? may they be certificating?
Perfect	V-ing perfect
may I have certificated? may you have certificated? may she have certificated? may we have certificated? may you have certificated? may they have certificated?	may I have been certificating? may you have been certificating? may she have been certificating? may we have been certificating? may you have been certificating? may they have been certificating?

Interro-negative form

Simple form	V-ing form
mayn't I certificate? mayn't you certificate? mayn't she certificate? mayn't we certificate? mayn't you certificate? mayn't they certificate?	mayn't I be certificating? mayn't you be certificating? mayn't she be certificating? mayn't we be certificating? mayn't you be certificating? mayn't they be certificating?
Perfect	V-ing perfect
mayn't I have certificated? mayn't you have certificated? mayn't she have certificated? mayn't we have certificated? mayn't you have certificated? mayn't they have certificated?	mayn't I have been certificating? mayn't you have been certificating? mayn't she have been certificating? mayn't we have been certificating? mayn't you have been certificating? mayn't they have been certificating?