I can web you can web she can web we can web you can web they can web
V-ing form
I can be webing you can be webing she can be webing we can be webing you can be webing they can be webing
Perfect
I can have webed you can have webed she can have webed we can have webed you can have webed they can have webed
V-ing perfect
I can have been webing you can have been webing she can have been webing we can have been webing you can have been webing they can have been webing
Negation
Simple form
I can't web you can't web she can't web we can't web you can't web they can't web
V-ing form
I can't be webing you can't be webing she can't be webing we can't be webing you can't be webing they can't be webing
Perfect
I can't have webed you can't have webed she can't have webed we can't have webed you can't have webed they can't have webed
V-ing perfect
I can't have been webing you can't have been webing she can't have been webing we can't have been webing you can't have been webing they can't have been webing
Interrogative form
Simple form
can I web? can you web? can she web? can we web? can you web? can they web?
V-ing form
can I be webing? can you be webing? can she be webing? can we be webing? can you be webing? can they be webing?
Perfect
can I have webed? can you have webed? can she have webed? can we have webed? can you have webed? can they have webed?
V-ing perfect
can I have been webing? can you have been webing? can she have been webing? can we have been webing? can you have been webing? can they have been webing?
Interro-negative form
Simple form
can't I web? can't you web? can't she web? can't we web? can't you web? can't they web?
V-ing form
can't I be webing? can't you be webing? can't she be webing? can't we be webing? can't you be webing? can't they be webing?
Perfect
can't I have webed? can't you have webed? can't she have webed? can't we have webed? can't you have webed? can't they have webed?
V-ing perfect
can't I have been webing? can't you have been webing? can't she have been webing? can't we have been webing? can't you have been webing? can't they have been webing?