English verb conjugation
MAY CLACK

Regular verb: clack - clacked - clacked

Affirmation

Simple form	V-ing form
I may clack you may clack he may clack we may clack you may clack they may clack	I may be clacking you may be clacking he may be clacking we may be clacking you may be clacking they may be clacking
Perfect	V-ing perfect
I may have clacked you may have clacked he may have clacked we may have clacked you may have clacked they may have clacked	I may have been clacking you may have been clacking he may have been clacking we may have been clacking you may have been clacking they may have been clacking

Negation

Simple form	V-ing form
I may not clack you may not clack he may not clack we may not clack you may not clack they may not clack	I may not be clacking you may not be clacking he may not be clacking we may not be clacking you may not be clacking they may not be clacking
Perfect	V-ing perfect
I may not have clacked you may not have clacked he may not have clacked we may not have clacked you may not have clacked they may not have clacked	I may not have been clacking you may not have been clacking he may not have been clacking we may not have been clacking you may not have been clacking they may not have been clacking

Interrogative form

Simple form	V-ing form
may I clack? may you clack? may he clack? may we clack? may you clack? may they clack?	may I be clacking? may you be clacking? may he be clacking? may we be clacking? may you be clacking? may they be clacking?
Perfect	V-ing perfect
may I have clacked? may you have clacked? may he have clacked? may we have clacked? may you have clacked? may they have clacked?	may I have been clacking? may you have been clacking? may he have been clacking? may we have been clacking? may you have been clacking? may they have been clacking?

Interro-negative form

Simple form	V-ing form
may I not clack? may you not clack? may he not clack? may we not clack? may you not clack? may they not clack?	may I not be clacking? may you not be clacking? may he not be clacking? may we not be clacking? may you not be clacking? may they not be clacking?
Perfect	V-ing perfect
may I not have clacked? may you not have clacked? may he not have clacked? may we not have clacked? may you not have clacked? may they not have clacked?	may I not have been clacking? may you not have been clacking? may he not have been clacking? may we not have been clacking? may you not have been clacking? may they not have been clacking?