English verb conjugation
CAN SIGHT

Regular verb: sight - sighted - sighted

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
I cannot sight you cannot sight he cannot sight we cannot sight you cannot sight they cannot sight	I cannot be sighting you cannot be sighting he cannot be sighting we cannot be sighting you cannot be sighting they cannot be sighting
Perfect	V-ing perfect
I cannot have sighted you cannot have sighted he cannot have sighted we cannot have sighted you cannot have sighted they cannot have sighted	I cannot have been sighting you cannot have been sighting he cannot have been sighting we cannot have been sighting you cannot have been sighting they cannot have been sighting

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
can I not sight? can you not sight? can he not sight? can we not sight? can you not sight? can they not sight?	can I not be sighting? can you not be sighting? can he not be sighting? can we not be sighting? can you not be sighting? can they not be sighting?
Perfect	V-ing perfect
can I not have sighted? can you not have sighted? can he not have sighted? can we not have sighted? can you not have sighted? can they not have sighted?	can I not have been sighting? can you not have been sighting? can he not have been sighting? can we not have been sighting? can you not have been sighting? can they not have been sighting?