must excogitate
Regular verb: excogitate - excogitated- excogitated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must excogitate
you must excogitate
she must excogitate
we must excogitate
you must excogitate
they must excogitate 	I must be excogitating
you must be excogitating
she must be excogitating
we must be excogitating
you must be excogitating
they must be excogitating	I must have excogitated
you must have excogitated
she must have excogitated
we must have excogitated
you must have excogitated
they must have excogitated	I must have been excogitating
you must have been excogitating
she must have been excogitating
we must have been excogitating
you must have been excogitating
they must have been excogitating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must not excogitate
you must not excogitate
she must not excogitate
we must not excogitate
you must not excogitate
they must not excogitate 	I must not be excogitating
you must not be excogitating
she must not be excogitating
we must not be excogitating
you must not be excogitating
they must not be excogitating	I must not have excogitated
you must not have excogitated
she must not have excogitated
we must not have excogitated
you must not have excogitated
they must not have excogitated	I must not have been excogitating
you must not have been excogitating
she must not have been excogitating
we must not have been excogitating
you must not have been excogitating
they must not have been excogitating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I excogitate?
must you excogitate?
must she excogitate?
must we excogitate?
must you excogitate?
must they excogitate? 	must I be excogitating?
must you be excogitating?
must she be excogitating?
must we be excogitating?
must you be excogitating?
must they be excogitating? 	must I have excogitated?
must you have excogitated?
must she have excogitated?
must we have excogitated?
must you have excogitated?
must they have excogitated? 	must I have been excogitating?
must you have been excogitating?
must she have been excogitating?
must we have been excogitating?
must you have been excogitating?
must they have been excogitating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I not excogitate?
must you not excogitate?
must she not excogitate?
must we not excogitate?
must you not excogitate?
must they not excogitate? 	must I not be excogitating?
must you not be excogitating?
must she not be excogitating?
must we not be excogitating?
must you not be excogitating?
must they not be excogitating? 	must I not have excogitated?
must you not have excogitated?
must she not have excogitated?
must we not have excogitated?
must you not have excogitated?
must they not have excogitated? 	must I not have been excogitating?
must you not have been excogitating?
must she not have been excogitating?
must we not have been excogitating?
must you not have been excogitating?
must they not have been excogitating?