English verb conjugation
CAN DECK

Regular verb: deck - decked - decked

Affirmation

Simple form	V-ing form
I can deck you can deck he can deck we can deck you can deck they can deck	I can be decking you can be decking he can be decking we can be decking you can be decking they can be decking
Perfect	V-ing perfect
I can have decked you can have decked he can have decked we can have decked you can have decked they can have decked	I can have been decking you can have been decking he can have been decking we can have been decking you can have been decking they can have been decking

Negation

Simple form	V-ing form
I can't deck you can't deck he can't deck we can't deck you can't deck they can't deck	I can't be decking you can't be decking he can't be decking we can't be decking you can't be decking they can't be decking
Perfect	V-ing perfect
I can't have decked you can't have decked he can't have decked we can't have decked you can't have decked they can't have decked	I can't have been decking you can't have been decking he can't have been decking we can't have been decking you can't have been decking they can't have been decking

Interrogative form

Simple form	V-ing form
can I deck? can you deck? can he deck? can we deck? can you deck? can they deck?	can I be decking? can you be decking? can he be decking? can we be decking? can you be decking? can they be decking?
Perfect	V-ing perfect
can I have decked? can you have decked? can he have decked? can we have decked? can you have decked? can they have decked?	can I have been decking? can you have been decking? can he have been decking? can we have been decking? can you have been decking? can they have been decking?

Interro-negative form

Simple form	V-ing form
can't I deck? can't you deck? can't he deck? can't we deck? can't you deck? can't they deck?	can't I be decking? can't you be decking? can't he be decking? can't we be decking? can't you be decking? can't they be decking?
Perfect	V-ing perfect
can't I have decked? can't you have decked? can't he have decked? can't we have decked? can't you have decked? can't they have decked?	can't I have been decking? can't you have been decking? can't he have been decking? can't we have been decking? can't you have been decking? can't they have been decking?