must speck
Verbo regular: speck - specked- specked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must speck
you must speck
he must speck
we must speck
you must speck
they must speck 	I must be specking
you must be specking
he must be specking
we must be specking
you must be specking
they must be specking	I must have specked
you must have specked
he must have specked
we must have specked
you must have specked
they must have specked	I must have been specking
you must have been specking
he must have been specking
we must have been specking
you must have been specking
they must have been specking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I must not speck
you must not speck
he must not speck
we must not speck
you must not speck
they must not speck 	I must not be specking
you must not be specking
he must not be specking
we must not be specking
you must not be specking
they must not be specking	I must not have specked
you must not have specked
he must not have specked
we must not have specked
you must not have specked
they must not have specked	I must not have been specking
you must not have been specking
he must not have been specking
we must not have been specking
you must not have been specking
they must not have been specking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I speck?
must you speck?
must he speck?
must we speck?
must you speck?
must they speck? 	must I be specking?
must you be specking?
must he be specking?
must we be specking?
must you be specking?
must they be specking? 	must I have specked?
must you have specked?
must he have specked?
must we have specked?
must you have specked?
must they have specked? 	must I have been specking?
must you have been specking?
must he have been specking?
must we have been specking?
must you have been specking?
must they have been specking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
must I not speck?
must you not speck?
must he not speck?
must we not speck?
must you not speck?
must they not speck? 	must I not be specking?
must you not be specking?
must he not be specking?
must we not be specking?
must you not be specking?
must they not be specking? 	must I not have specked?
must you not have specked?
must he not have specked?
must we not have specked?
must you not have specked?
must they not have specked? 	must I not have been specking?
must you not have been specking?
must he not have been specking?
must we not have been specking?
must you not have been specking?
must they not have been specking?