English verb conjugation
MUST DECK

Regular verb: deck - decked - decked

Affirmation

Simple form	V-ing form
I must deck you must deck she must deck we must deck you must deck they must deck	I must be decking you must be decking she must be decking we must be decking you must be decking they must be decking
Perfect	V-ing perfect
I must have decked you must have decked she must have decked we must have decked you must have decked they must have decked	I must have been decking you must have been decking she must have been decking we must have been decking you must have been decking they must have been decking

Negation

Simple form	V-ing form
I must not deck you must not deck she must not deck we must not deck you must not deck they must not deck	I must not be decking you must not be decking she must not be decking we must not be decking you must not be decking they must not be decking
Perfect	V-ing perfect
I must not have decked you must not have decked she must not have decked we must not have decked you must not have decked they must not have decked	I must not have been decking you must not have been decking she must not have been decking we must not have been decking you must not have been decking they must not have been decking

Interrogative form

Simple form	V-ing form
must I deck? must you deck? must she deck? must we deck? must you deck? must they deck?	must I be decking? must you be decking? must she be decking? must we be decking? must you be decking? must they be decking?
Perfect	V-ing perfect
must I have decked? must you have decked? must she have decked? must we have decked? must you have decked? must they have decked?	must I have been decking? must you have been decking? must she have been decking? must we have been decking? must you have been decking? must they have been decking?

Interro-negative form

Simple form	V-ing form
must I not deck? must you not deck? must she not deck? must we not deck? must you not deck? must they not deck?	must I not be decking? must you not be decking? must she not be decking? must we not be decking? must you not be decking? must they not be decking?
Perfect	V-ing perfect
must I not have decked? must you not have decked? must she not have decked? must we not have decked? must you not have decked? must they not have decked?	must I not have been decking? must you not have been decking? must she not have been decking? must we not have been decking? must you not have been decking? must they not have been decking?