English verb conjugation
CAN STALE

Regular verb: stale - staled - staled

Affirmation

Simple form	V-ing form
I can stale you can stale he can stale we can stale you can stale they can stale	I can be staling you can be staling he can be staling we can be staling you can be staling they can be staling
Perfect	V-ing perfect
I can have staled you can have staled he can have staled we can have staled you can have staled they can have staled	I can have been staling you can have been staling he can have been staling we can have been staling you can have been staling they can have been staling

Negation

Simple form	V-ing form
I cannot stale you cannot stale he cannot stale we cannot stale you cannot stale they cannot stale	I cannot be staling you cannot be staling he cannot be staling we cannot be staling you cannot be staling they cannot be staling
Perfect	V-ing perfect
I cannot have staled you cannot have staled he cannot have staled we cannot have staled you cannot have staled they cannot have staled	I cannot have been staling you cannot have been staling he cannot have been staling we cannot have been staling you cannot have been staling they cannot have been staling

Interrogative form

Simple form	V-ing form
can I stale? can you stale? can he stale? can we stale? can you stale? can they stale?	can I be staling? can you be staling? can he be staling? can we be staling? can you be staling? can they be staling?
Perfect	V-ing perfect
can I have staled? can you have staled? can he have staled? can we have staled? can you have staled? can they have staled?	can I have been staling? can you have been staling? can he have been staling? can we have been staling? can you have been staling? can they have been staling?

Interro-negative form

Simple form	V-ing form
can I not stale? can you not stale? can he not stale? can we not stale? can you not stale? can they not stale?	can I not be staling? can you not be staling? can he not be staling? can we not be staling? can you not be staling? can they not be staling?
Perfect	V-ing perfect
can I not have staled? can you not have staled? can he not have staled? can we not have staled? can you not have staled? can they not have staled?	can I not have been staling? can you not have been staling? can he not have been staling? can we not have been staling? can you not have been staling? can they not have been staling?