English verb conjugation
MUST EXECUTE

Regular verb: execute - executed - executed

Affirmation

Simple form	V-ing form
I must execute you must execute she must execute we must execute you must execute they must execute	I must be executing you must be executing she must be executing we must be executing you must be executing they must be executing
Perfect	V-ing perfect
I must have executed you must have executed she must have executed we must have executed you must have executed they must have executed	I must have been executing you must have been executing she must have been executing we must have been executing you must have been executing they must have been executing

Negation

Simple form	V-ing form
I mustn't execute you mustn't execute she mustn't execute we mustn't execute you mustn't execute they mustn't execute	I mustn't be executing you mustn't be executing she mustn't be executing we mustn't be executing you mustn't be executing they mustn't be executing
Perfect	V-ing perfect
I mustn't have executed you mustn't have executed she mustn't have executed we mustn't have executed you mustn't have executed they mustn't have executed	I mustn't have been executing you mustn't have been executing she mustn't have been executing we mustn't have been executing you mustn't have been executing they mustn't have been executing

Interrogative form

Simple form	V-ing form
must I execute? must you execute? must she execute? must we execute? must you execute? must they execute?	must I be executing? must you be executing? must she be executing? must we be executing? must you be executing? must they be executing?
Perfect	V-ing perfect
must I have executed? must you have executed? must she have executed? must we have executed? must you have executed? must they have executed?	must I have been executing? must you have been executing? must she have been executing? must we have been executing? must you have been executing? must they have been executing?

Interro-negative form

Simple form	V-ing form
mustn't I execute? mustn't you execute? mustn't she execute? mustn't we execute? mustn't you execute? mustn't they execute?	mustn't I be executing? mustn't you be executing? mustn't she be executing? mustn't we be executing? mustn't you be executing? mustn't they be executing?
Perfect	V-ing perfect
mustn't I have executed? mustn't you have executed? mustn't she have executed? mustn't we have executed? mustn't you have executed? mustn't they have executed?	mustn't I have been executing? mustn't you have been executing? mustn't she have been executing? mustn't we have been executing? mustn't you have been executing? mustn't they have been executing?