must speculate
Verbo regular: speculate - speculated- speculated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	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	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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	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	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	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? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
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? 	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?