I can burke you can burke he can burke we can burke you can burke they can burke
V-ing form
I can be burking you can be burking he can be burking we can be burking you can be burking they can be burking
Perfect
I can have burked you can have burked he can have burked we can have burked you can have burked they can have burked
V-ing perfect
I can have been burking you can have been burking he can have been burking we can have been burking you can have been burking they can have been burking
Negation
Simple form
I can't burke you can't burke he can't burke we can't burke you can't burke they can't burke
V-ing form
I can't be burking you can't be burking he can't be burking we can't be burking you can't be burking they can't be burking
Perfect
I can't have burked you can't have burked he can't have burked we can't have burked you can't have burked they can't have burked
V-ing perfect
I can't have been burking you can't have been burking he can't have been burking we can't have been burking you can't have been burking they can't have been burking
Interrogative form
Simple form
can I burke? can you burke? can he burke? can we burke? can you burke? can they burke?
V-ing form
can I be burking? can you be burking? can he be burking? can we be burking? can you be burking? can they be burking?
Perfect
can I have burked? can you have burked? can he have burked? can we have burked? can you have burked? can they have burked?
V-ing perfect
can I have been burking? can you have been burking? can he have been burking? can we have been burking? can you have been burking? can they have been burking?
Interro-negative form
Simple form
can't I burke? can't you burke? can't he burke? can't we burke? can't you burke? can't they burke?
V-ing form
can't I be burking? can't you be burking? can't he be burking? can't we be burking? can't you be burking? can't they be burking?
Perfect
can't I have burked? can't you have burked? can't he have burked? can't we have burked? can't you have burked? can't they have burked?
V-ing perfect
can't I have been burking? can't you have been burking? can't he have been burking? can't we have been burking? can't you have been burking? can't they have been burking?