can suck
Verbo regular: suck - sucked- sucked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I can suck
you can suck
he can suck
we can suck
you can suck
they can suck 	I can be sucking
you can be sucking
he can be sucking
we can be sucking
you can be sucking
they can be sucking	I can have sucked
you can have sucked
he can have sucked
we can have sucked
you can have sucked
they can have sucked	I can have been sucking
you can have been sucking
he can have been sucking
we can have been sucking
you can have been sucking
they can have been sucking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I cannot suck
you cannot suck
he cannot suck
we cannot suck
you cannot suck
they cannot suck 	I cannot be sucking
you cannot be sucking
he cannot be sucking
we cannot be sucking
you cannot be sucking
they cannot be sucking	I cannot have sucked
you cannot have sucked
he cannot have sucked
we cannot have sucked
you cannot have sucked
they cannot have sucked	I cannot have been sucking
you cannot have been sucking
he cannot have been sucking
we cannot have been sucking
you cannot have been sucking
they cannot have been sucking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I suck?
can you suck?
can he suck?
can we suck?
can you suck?
can they suck? 	can I be sucking?
can you be sucking?
can he be sucking?
can we be sucking?
can you be sucking?
can they be sucking? 	can I have sucked?
can you have sucked?
can he have sucked?
can we have sucked?
can you have sucked?
can they have sucked? 	can I have been sucking?
can you have been sucking?
can he have been sucking?
can we have been sucking?
can you have been sucking?
can they have been sucking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
can I not suck?
can you not suck?
can he not suck?
can we not suck?
can you not suck?
can they not suck? 	can I not be sucking?
can you not be sucking?
can he not be sucking?
can we not be sucking?
can you not be sucking?
can they not be sucking? 	can I not have sucked?
can you not have sucked?
can he not have sucked?
can we not have sucked?
can you not have sucked?
can they not have sucked? 	can I not have been sucking?
can you not have been sucking?
can he not have been sucking?
can we not have been sucking?
can you not have been sucking?
can they not have been sucking?