can sight
Verbo regular: sight - sighted- sighted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can sight
you can sight
he can sight
we can sight
you can sight
they can sight 	I can be sighting
you can be sighting
he can be sighting
we can be sighting
you can be sighting
they can be sighting	I can have sighted
you can have sighted
he can have sighted
we can have sighted
you can have sighted
they can have sighted	I can have been sighting
you can have been sighting
he can have been sighting
we can have been sighting
you can have been sighting
they can have been sighting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can't sight
you can't sight
he can't sight
we can't sight
you can't sight
they can't sight 	I can't be sighting
you can't be sighting
he can't be sighting
we can't be sighting
you can't be sighting
they can't be sighting	I can't have sighted
you can't have sighted
he can't have sighted
we can't have sighted
you can't have sighted
they can't have sighted	I can't have been sighting
you can't have been sighting
he can't have been sighting
we can't have been sighting
you can't have been sighting
they can't have been sighting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I sight?
can you sight?
can he sight?
can we sight?
can you sight?
can they sight? 	can I be sighting?
can you be sighting?
can he be sighting?
can we be sighting?
can you be sighting?
can they be sighting? 	can I have sighted?
can you have sighted?
can he have sighted?
can we have sighted?
can you have sighted?
can they have sighted? 	can I have been sighting?
can you have been sighting?
can he have been sighting?
can we have been sighting?
can you have been sighting?
can they have been sighting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can't I sight?
can't you sight?
can't he sight?
can't we sight?
can't you sight?
can't they sight? 	can't I be sighting?
can't you be sighting?
can't he be sighting?
can't we be sighting?
can't you be sighting?
can't they be sighting? 	can't I have sighted?
can't you have sighted?
can't he have sighted?
can't we have sighted?
can't you have sighted?
can't they have sighted? 	can't I have been sighting?
can't you have been sighting?
can't he have been sighting?
can't we have been sighting?
can't you have been sighting?
can't they have been sighting?