can tail
Verbo regular: tail - tailed- tailed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can tail
you can tail
he can tail
we can tail
you can tail
they can tail 	I can be tailing
you can be tailing
he can be tailing
we can be tailing
you can be tailing
they can be tailing	I can have tailed
you can have tailed
he can have tailed
we can have tailed
you can have tailed
they can have tailed	I can have been tailing
you can have been tailing
he can have been tailing
we can have been tailing
you can have been tailing
they can have been tailing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot tail
you cannot tail
he cannot tail
we cannot tail
you cannot tail
they cannot tail 	I cannot be tailing
you cannot be tailing
he cannot be tailing
we cannot be tailing
you cannot be tailing
they cannot be tailing	I cannot have tailed
you cannot have tailed
he cannot have tailed
we cannot have tailed
you cannot have tailed
they cannot have tailed	I cannot have been tailing
you cannot have been tailing
he cannot have been tailing
we cannot have been tailing
you cannot have been tailing
they cannot have been tailing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I tail?
can you tail?
can he tail?
can we tail?
can you tail?
can they tail? 	can I be tailing?
can you be tailing?
can he be tailing?
can we be tailing?
can you be tailing?
can they be tailing? 	can I have tailed?
can you have tailed?
can he have tailed?
can we have tailed?
can you have tailed?
can they have tailed? 	can I have been tailing?
can you have been tailing?
can he have been tailing?
can we have been tailing?
can you have been tailing?
can they have been tailing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not tail?
can you not tail?
can he not tail?
can we not tail?
can you not tail?
can they not tail? 	can I not be tailing?
can you not be tailing?
can he not be tailing?
can we not be tailing?
can you not be tailing?
can they not be tailing? 	can I not have tailed?
can you not have tailed?
can he not have tailed?
can we not have tailed?
can you not have tailed?
can they not have tailed? 	can I not have been tailing?
can you not have been tailing?
can he not have been tailing?
can we not have been tailing?
can you not have been tailing?
can they not have been tailing?