I can span you can span he can span we can span you can span they can span
V-ing form
I can be spanning you can be spanning he can be spanning we can be spanning you can be spanning they can be spanning
Perfect
I can have spanned you can have spanned he can have spanned we can have spanned you can have spanned they can have spanned
V-ing perfect
I can have been spanning you can have been spanning he can have been spanning we can have been spanning you can have been spanning they can have been spanning
Negation
Simple form
I can't span you can't span he can't span we can't span you can't span they can't span
V-ing form
I can't be spanning you can't be spanning he can't be spanning we can't be spanning you can't be spanning they can't be spanning
Perfect
I can't have spanned you can't have spanned he can't have spanned we can't have spanned you can't have spanned they can't have spanned
V-ing perfect
I can't have been spanning you can't have been spanning he can't have been spanning we can't have been spanning you can't have been spanning they can't have been spanning
Interrogative form
Simple form
can I span? can you span? can he span? can we span? can you span? can they span?
V-ing form
can I be spanning? can you be spanning? can he be spanning? can we be spanning? can you be spanning? can they be spanning?
Perfect
can I have spanned? can you have spanned? can he have spanned? can we have spanned? can you have spanned? can they have spanned?
V-ing perfect
can I have been spanning? can you have been spanning? can he have been spanning? can we have been spanning? can you have been spanning? can they have been spanning?
Interro-negative form
Simple form
can't I span? can't you span? can't he span? can't we span? can't you span? can't they span?
V-ing form
can't I be spanning? can't you be spanning? can't he be spanning? can't we be spanning? can't you be spanning? can't they be spanning?
Perfect
can't I have spanned? can't you have spanned? can't he have spanned? can't we have spanned? can't you have spanned? can't they have spanned?
V-ing perfect
can't I have been spanning? can't you have been spanning? can't he have been spanning? can't we have been spanning? can't you have been spanning? can't they have been spanning?