I can site you can site he can site we can site you can site they can site
V-ing form
I can be siting you can be siting he can be siting we can be siting you can be siting they can be siting
Perfect
I can have sited you can have sited he can have sited we can have sited you can have sited they can have sited
V-ing perfect
I can have been siting you can have been siting he can have been siting we can have been siting you can have been siting they can have been siting
Negation
Simple form
I can't site you can't site he can't site we can't site you can't site they can't site
V-ing form
I can't be siting you can't be siting he can't be siting we can't be siting you can't be siting they can't be siting
Perfect
I can't have sited you can't have sited he can't have sited we can't have sited you can't have sited they can't have sited
V-ing perfect
I can't have been siting you can't have been siting he can't have been siting we can't have been siting you can't have been siting they can't have been siting
Interrogative form
Simple form
can I site? can you site? can he site? can we site? can you site? can they site?
V-ing form
can I be siting? can you be siting? can he be siting? can we be siting? can you be siting? can they be siting?
Perfect
can I have sited? can you have sited? can he have sited? can we have sited? can you have sited? can they have sited?
V-ing perfect
can I have been siting? can you have been siting? can he have been siting? can we have been siting? can you have been siting? can they have been siting?
Interro-negative form
Simple form
can't I site? can't you site? can't he site? can't we site? can't you site? can't they site?
V-ing form
can't I be siting? can't you be siting? can't he be siting? can't we be siting? can't you be siting? can't they be siting?
Perfect
can't I have sited? can't you have sited? can't he have sited? can't we have sited? can't you have sited? can't they have sited?
V-ing perfect
can't I have been siting? can't you have been siting? can't he have been siting? can't we have been siting? can't you have been siting? can't they have been siting?