I can scull you can scull he can scull we can scull you can scull they can scull
V-ing form
I can be sculling you can be sculling he can be sculling we can be sculling you can be sculling they can be sculling
Perfect
I can have sculled you can have sculled he can have sculled we can have sculled you can have sculled they can have sculled
V-ing perfect
I can have been sculling you can have been sculling he can have been sculling we can have been sculling you can have been sculling they can have been sculling
Negation
Simple form
I cannot scull you cannot scull he cannot scull we cannot scull you cannot scull they cannot scull
V-ing form
I cannot be sculling you cannot be sculling he cannot be sculling we cannot be sculling you cannot be sculling they cannot be sculling
Perfect
I cannot have sculled you cannot have sculled he cannot have sculled we cannot have sculled you cannot have sculled they cannot have sculled
V-ing perfect
I cannot have been sculling you cannot have been sculling he cannot have been sculling we cannot have been sculling you cannot have been sculling they cannot have been sculling
Interrogative form
Simple form
can I scull? can you scull? can he scull? can we scull? can you scull? can they scull?
V-ing form
can I be sculling? can you be sculling? can he be sculling? can we be sculling? can you be sculling? can they be sculling?
Perfect
can I have sculled? can you have sculled? can he have sculled? can we have sculled? can you have sculled? can they have sculled?
V-ing perfect
can I have been sculling? can you have been sculling? can he have been sculling? can we have been sculling? can you have been sculling? can they have been sculling?
Interro-negative form
Simple form
can I not scull? can you not scull? can he not scull? can we not scull? can you not scull? can they not scull?
V-ing form
can I not be sculling? can you not be sculling? can he not be sculling? can we not be sculling? can you not be sculling? can they not be sculling?
Perfect
can I not have sculled? can you not have sculled? can he not have sculled? can we not have sculled? can you not have sculled? can they not have sculled?
V-ing perfect
can I not have been sculling? can you not have been sculling? can he not have been sculling? can we not have been sculling? can you not have been sculling? can they not have been sculling?