English verb conjugation
MUST CONCAVE

Regular verb: concave - concaved - concaved

Affirmation

Simple form	V-ing form
I must concave you must concave she must concave we must concave you must concave they must concave	I must be concaving you must be concaving she must be concaving we must be concaving you must be concaving they must be concaving
Perfect	V-ing perfect
I must have concaved you must have concaved she must have concaved we must have concaved you must have concaved they must have concaved	I must have been concaving you must have been concaving she must have been concaving we must have been concaving you must have been concaving they must have been concaving

Negation

Simple form	V-ing form
I must not concave you must not concave she must not concave we must not concave you must not concave they must not concave	I must not be concaving you must not be concaving she must not be concaving we must not be concaving you must not be concaving they must not be concaving
Perfect	V-ing perfect
I must not have concaved you must not have concaved she must not have concaved we must not have concaved you must not have concaved they must not have concaved	I must not have been concaving you must not have been concaving she must not have been concaving we must not have been concaving you must not have been concaving they must not have been concaving

Interrogative form

Simple form	V-ing form
must I concave? must you concave? must she concave? must we concave? must you concave? must they concave?	must I be concaving? must you be concaving? must she be concaving? must we be concaving? must you be concaving? must they be concaving?
Perfect	V-ing perfect
must I have concaved? must you have concaved? must she have concaved? must we have concaved? must you have concaved? must they have concaved?	must I have been concaving? must you have been concaving? must she have been concaving? must we have been concaving? must you have been concaving? must they have been concaving?

Interro-negative form

Simple form	V-ing form
must I not concave? must you not concave? must she not concave? must we not concave? must you not concave? must they not concave?	must I not be concaving? must you not be concaving? must she not be concaving? must we not be concaving? must you not be concaving? must they not be concaving?
Perfect	V-ing perfect
must I not have concaved? must you not have concaved? must she not have concaved? must we not have concaved? must you not have concaved? must they not have concaved?	must I not have been concaving? must you not have been concaving? must she not have been concaving? must we not have been concaving? must you not have been concaving? must they not have been concaving?