English verb conjugation
MUST SPECULATE

Regular verb: speculate - speculated - speculated

Affirmation

Simple form	V-ing form
I must speculate you must speculate he must speculate we must speculate you must speculate they must speculate	I must be speculating you must be speculating he must be speculating we must be speculating you must be speculating they must be speculating
Perfect	V-ing perfect
I must have speculated you must have speculated he must have speculated we must have speculated you must have speculated they must have speculated	I must have been speculating you must have been speculating he must have been speculating we must have been speculating you must have been speculating they must have been speculating

Negation

Simple form	V-ing form
I must not speculate you must not speculate he must not speculate we must not speculate you must not speculate they must not speculate	I must not be speculating you must not be speculating he must not be speculating we must not be speculating you must not be speculating they must not be speculating
Perfect	V-ing perfect
I must not have speculated you must not have speculated he must not have speculated we must not have speculated you must not have speculated they must not have speculated	I must not have been speculating you must not have been speculating he must not have been speculating we must not have been speculating you must not have been speculating they must not have been speculating

Interrogative form

Simple form	V-ing form
must I speculate? must you speculate? must he speculate? must we speculate? must you speculate? must they speculate?	must I be speculating? must you be speculating? must he be speculating? must we be speculating? must you be speculating? must they be speculating?
Perfect	V-ing perfect
must I have speculated? must you have speculated? must he have speculated? must we have speculated? must you have speculated? must they have speculated?	must I have been speculating? must you have been speculating? must he have been speculating? must we have been speculating? must you have been speculating? must they have been speculating?

Interro-negative form

Simple form	V-ing form
must I not speculate? must you not speculate? must he not speculate? must we not speculate? must you not speculate? must they not speculate?	must I not be speculating? must you not be speculating? must he not be speculating? must we not be speculating? must you not be speculating? must they not be speculating?
Perfect	V-ing perfect
must I not have speculated? must you not have speculated? must he not have speculated? must we not have speculated? must you not have speculated? must they not have speculated?	must I not have been speculating? must you not have been speculating? must he not have been speculating? must we not have been speculating? must you not have been speculating? must they not have been speculating?