English verb conjugation
CAN LADDER

Regular verb: ladder - laddered - laddered

Affirmation

Simple form	V-ing form
I can ladder you can ladder he can ladder we can ladder you can ladder they can ladder	I can be laddering you can be laddering he can be laddering we can be laddering you can be laddering they can be laddering
Perfect	V-ing perfect
I can have laddered you can have laddered he can have laddered we can have laddered you can have laddered they can have laddered	I can have been laddering you can have been laddering he can have been laddering we can have been laddering you can have been laddering they can have been laddering

Negation

Simple form	V-ing form
I cannot ladder you cannot ladder he cannot ladder we cannot ladder you cannot ladder they cannot ladder	I cannot be laddering you cannot be laddering he cannot be laddering we cannot be laddering you cannot be laddering they cannot be laddering
Perfect	V-ing perfect
I cannot have laddered you cannot have laddered he cannot have laddered we cannot have laddered you cannot have laddered they cannot have laddered	I cannot have been laddering you cannot have been laddering he cannot have been laddering we cannot have been laddering you cannot have been laddering they cannot have been laddering

Interrogative form

Simple form	V-ing form
can I ladder? can you ladder? can he ladder? can we ladder? can you ladder? can they ladder?	can I be laddering? can you be laddering? can he be laddering? can we be laddering? can you be laddering? can they be laddering?
Perfect	V-ing perfect
can I have laddered? can you have laddered? can he have laddered? can we have laddered? can you have laddered? can they have laddered?	can I have been laddering? can you have been laddering? can he have been laddering? can we have been laddering? can you have been laddering? can they have been laddering?

Interro-negative form

Simple form	V-ing form
can I not ladder? can you not ladder? can he not ladder? can we not ladder? can you not ladder? can they not ladder?	can I not be laddering? can you not be laddering? can he not be laddering? can we not be laddering? can you not be laddering? can they not be laddering?
Perfect	V-ing perfect
can I not have laddered? can you not have laddered? can he not have laddered? can we not have laddered? can you not have laddered? can they not have laddered?	can I not have been laddering? can you not have been laddering? can he not have been laddering? can we not have been laddering? can you not have been laddering? can they not have been laddering?