I can gobble you can gobble she can gobble we can gobble you can gobble they can gobble
V-ing form
I can be gobbling you can be gobbling she can be gobbling we can be gobbling you can be gobbling they can be gobbling
Perfect
I can have gobbled you can have gobbled she can have gobbled we can have gobbled you can have gobbled they can have gobbled
V-ing perfect
I can have been gobbling you can have been gobbling she can have been gobbling we can have been gobbling you can have been gobbling they can have been gobbling
Negation
Simple form
I can't gobble you can't gobble she can't gobble we can't gobble you can't gobble they can't gobble
V-ing form
I can't be gobbling you can't be gobbling she can't be gobbling we can't be gobbling you can't be gobbling they can't be gobbling
Perfect
I can't have gobbled you can't have gobbled she can't have gobbled we can't have gobbled you can't have gobbled they can't have gobbled
V-ing perfect
I can't have been gobbling you can't have been gobbling she can't have been gobbling we can't have been gobbling you can't have been gobbling they can't have been gobbling
Interrogative form
Simple form
can I gobble? can you gobble? can she gobble? can we gobble? can you gobble? can they gobble?
V-ing form
can I be gobbling? can you be gobbling? can she be gobbling? can we be gobbling? can you be gobbling? can they be gobbling?
Perfect
can I have gobbled? can you have gobbled? can she have gobbled? can we have gobbled? can you have gobbled? can they have gobbled?
V-ing perfect
can I have been gobbling? can you have been gobbling? can she have been gobbling? can we have been gobbling? can you have been gobbling? can they have been gobbling?
Interro-negative form
Simple form
can't I gobble? can't you gobble? can't she gobble? can't we gobble? can't you gobble? can't they gobble?
V-ing form
can't I be gobbling? can't you be gobbling? can't she be gobbling? can't we be gobbling? can't you be gobbling? can't they be gobbling?
Perfect
can't I have gobbled? can't you have gobbled? can't she have gobbled? can't we have gobbled? can't you have gobbled? can't they have gobbled?
V-ing perfect
can't I have been gobbling? can't you have been gobbling? can't she have been gobbling? can't we have been gobbling? can't you have been gobbling? can't they have been gobbling?