English verb conjugation
CAN FIB

Regular verb: fib - fibbed - fibbed

Affirmation

Simple form	V-ing form
I can fib you can fib he can fib we can fib you can fib they can fib	I can be fibbing you can be fibbing he can be fibbing we can be fibbing you can be fibbing they can be fibbing
Perfect	V-ing perfect
I can have fibbed you can have fibbed he can have fibbed we can have fibbed you can have fibbed they can have fibbed	I can have been fibbing you can have been fibbing he can have been fibbing we can have been fibbing you can have been fibbing they can have been fibbing

Negation

Simple form	V-ing form
I cannot fib you cannot fib he cannot fib we cannot fib you cannot fib they cannot fib	I cannot be fibbing you cannot be fibbing he cannot be fibbing we cannot be fibbing you cannot be fibbing they cannot be fibbing
Perfect	V-ing perfect
I cannot have fibbed you cannot have fibbed he cannot have fibbed we cannot have fibbed you cannot have fibbed they cannot have fibbed	I cannot have been fibbing you cannot have been fibbing he cannot have been fibbing we cannot have been fibbing you cannot have been fibbing they cannot have been fibbing

Interrogative form

Simple form	V-ing form
can I fib? can you fib? can he fib? can we fib? can you fib? can they fib?	can I be fibbing? can you be fibbing? can he be fibbing? can we be fibbing? can you be fibbing? can they be fibbing?
Perfect	V-ing perfect
can I have fibbed? can you have fibbed? can he have fibbed? can we have fibbed? can you have fibbed? can they have fibbed?	can I have been fibbing? can you have been fibbing? can he have been fibbing? can we have been fibbing? can you have been fibbing? can they have been fibbing?

Interro-negative form

Simple form	V-ing form
can I not fib? can you not fib? can he not fib? can we not fib? can you not fib? can they not fib?	can I not be fibbing? can you not be fibbing? can he not be fibbing? can we not be fibbing? can you not be fibbing? can they not be fibbing?
Perfect	V-ing perfect
can I not have fibbed? can you not have fibbed? can he not have fibbed? can we not have fibbed? can you not have fibbed? can they not have fibbed?	can I not have been fibbing? can you not have been fibbing? can he not have been fibbing? can we not have been fibbing? can you not have been fibbing? can they not have been fibbing?