English verb conjugation
MUST EXECUTE

Regular verb: execute - executed - executed

Affirmation

Simple form	V-ing form
I must execute you must execute he must execute we must execute you must execute they must execute	I must be executing you must be executing he 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 he 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 he 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 must not execute you must not execute he must not execute we must not execute you must not execute they must not execute	I must not be executing you must not be executing he must not be executing we must not be executing you must not be executing they must not be executing
Perfect	V-ing perfect
I must not have executed you must not have executed he must not have executed we must not have executed you must not have executed they must not have executed	I must not have been executing you must not have been executing he must not have been executing we must not have been executing you must not have been executing they must not have been executing

Interrogative form

Simple form	V-ing form
must I execute? must you execute? must he execute? must we execute? must you execute? must they execute?	must I be executing? must you be executing? must he 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 he 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 he 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
must I not execute? must you not execute? must he not execute? must we not execute? must you not execute? must they not execute?	must I not be executing? must you not be executing? must he not be executing? must we not be executing? must you not be executing? must they not be executing?
Perfect	V-ing perfect
must I not have executed? must you not have executed? must he not have executed? must we not have executed? must you not have executed? must they not have executed?	must I not have been executing? must you not have been executing? must he not have been executing? must we not have been executing? must you not have been executing? must they not have been executing?