I can toll you can toll he can toll we can toll you can toll they can toll
V-ing form
I can be tolling you can be tolling he can be tolling we can be tolling you can be tolling they can be tolling
Perfect
I can have tolled you can have tolled he can have tolled we can have tolled you can have tolled they can have tolled
V-ing perfect
I can have been tolling you can have been tolling he can have been tolling we can have been tolling you can have been tolling they can have been tolling
Negation
Simple form
I can't toll you can't toll he can't toll we can't toll you can't toll they can't toll
V-ing form
I can't be tolling you can't be tolling he can't be tolling we can't be tolling you can't be tolling they can't be tolling
Perfect
I can't have tolled you can't have tolled he can't have tolled we can't have tolled you can't have tolled they can't have tolled
V-ing perfect
I can't have been tolling you can't have been tolling he can't have been tolling we can't have been tolling you can't have been tolling they can't have been tolling
Interrogative form
Simple form
can I toll? can you toll? can he toll? can we toll? can you toll? can they toll?
V-ing form
can I be tolling? can you be tolling? can he be tolling? can we be tolling? can you be tolling? can they be tolling?
Perfect
can I have tolled? can you have tolled? can he have tolled? can we have tolled? can you have tolled? can they have tolled?
V-ing perfect
can I have been tolling? can you have been tolling? can he have been tolling? can we have been tolling? can you have been tolling? can they have been tolling?
Interro-negative form
Simple form
can't I toll? can't you toll? can't he toll? can't we toll? can't you toll? can't they toll?
V-ing form
can't I be tolling? can't you be tolling? can't he be tolling? can't we be tolling? can't you be tolling? can't they be tolling?
Perfect
can't I have tolled? can't you have tolled? can't he have tolled? can't we have tolled? can't you have tolled? can't they have tolled?
V-ing perfect
can't I have been tolling? can't you have been tolling? can't he have been tolling? can't we have been tolling? can't you have been tolling? can't they have been tolling?