English verb conjugation
COULD SCULL

Regular verb: scull - sculled - sculled

Affirmation

Simple form	V-ing form
I could scull you could scull he could scull we could scull you could scull they could scull	I could be sculling you could be sculling he could be sculling we could be sculling you could be sculling they could be sculling
Perfect	V-ing perfect
I could have sculled you could have sculled he could have sculled we could have sculled you could have sculled they could have sculled	I could have been sculling you could have been sculling he could have been sculling we could have been sculling you could have been sculling they could have been sculling

Negation

Simple form	V-ing form
I could not scull you could not scull he could not scull we could not scull you could not scull they could not scull	I could not be sculling you could not be sculling he could not be sculling we could not be sculling you could not be sculling they could not be sculling
Perfect	V-ing perfect
I could not have sculled you could not have sculled he could not have sculled we could not have sculled you could not have sculled they could not have sculled	I could not have been sculling you could not have been sculling he could not have been sculling we could not have been sculling you could not have been sculling they could not have been sculling

Interrogative form

Simple form	V-ing form
could I scull? could you scull? could he scull? could we scull? could you scull? could they scull?	could I be sculling? could you be sculling? could he be sculling? could we be sculling? could you be sculling? could they be sculling?
Perfect	V-ing perfect
could I have sculled? could you have sculled? could he have sculled? could we have sculled? could you have sculled? could they have sculled?	could I have been sculling? could you have been sculling? could he have been sculling? could we have been sculling? could you have been sculling? could they have been sculling?

Interro-negative form

Simple form	V-ing form
could I not scull? could you not scull? could he not scull? could we not scull? could you not scull? could they not scull?	could I not be sculling? could you not be sculling? could he not be sculling? could we not be sculling? could you not be sculling? could they not be sculling?
Perfect	V-ing perfect
could I not have sculled? could you not have sculled? could he not have sculled? could we not have sculled? could you not have sculled? could they not have sculled?	could I not have been sculling? could you not have been sculling? could he not have been sculling? could we not have been sculling? could you not have been sculling? could they not have been sculling?