English verb conjugation
CAN DECAY

Regular verb: decay - decayed - decayed

Affirmation

Simple form	V-ing form
I can decay you can decay he can decay we can decay you can decay they can decay	I can be decaying you can be decaying he can be decaying we can be decaying you can be decaying they can be decaying
Perfect	V-ing perfect
I can have decayed you can have decayed he can have decayed we can have decayed you can have decayed they can have decayed	I can have been decaying you can have been decaying he can have been decaying we can have been decaying you can have been decaying they can have been decaying

Negation

Simple form	V-ing form
I can't decay you can't decay he can't decay we can't decay you can't decay they can't decay	I can't be decaying you can't be decaying he can't be decaying we can't be decaying you can't be decaying they can't be decaying
Perfect	V-ing perfect
I can't have decayed you can't have decayed he can't have decayed we can't have decayed you can't have decayed they can't have decayed	I can't have been decaying you can't have been decaying he can't have been decaying we can't have been decaying you can't have been decaying they can't have been decaying

Interrogative form

Simple form	V-ing form
can I decay? can you decay? can he decay? can we decay? can you decay? can they decay?	can I be decaying? can you be decaying? can he be decaying? can we be decaying? can you be decaying? can they be decaying?
Perfect	V-ing perfect
can I have decayed? can you have decayed? can he have decayed? can we have decayed? can you have decayed? can they have decayed?	can I have been decaying? can you have been decaying? can he have been decaying? can we have been decaying? can you have been decaying? can they have been decaying?

Interro-negative form

Simple form	V-ing form
can't I decay? can't you decay? can't he decay? can't we decay? can't you decay? can't they decay?	can't I be decaying? can't you be decaying? can't he be decaying? can't we be decaying? can't you be decaying? can't they be decaying?
Perfect	V-ing perfect
can't I have decayed? can't you have decayed? can't he have decayed? can't we have decayed? can't you have decayed? can't they have decayed?	can't I have been decaying? can't you have been decaying? can't he have been decaying? can't we have been decaying? can't you have been decaying? can't they have been decaying?