I could chlorinate you could chlorinate he could chlorinate we could chlorinate you could chlorinate they could chlorinate
V-ing form
I could be chlorinating you could be chlorinating he could be chlorinating we could be chlorinating you could be chlorinating they could be chlorinating
Perfect
I could have chlorinated you could have chlorinated he could have chlorinated we could have chlorinated you could have chlorinated they could have chlorinated
V-ing perfect
I could have been chlorinating you could have been chlorinating he could have been chlorinating we could have been chlorinating you could have been chlorinating they could have been chlorinating
Negation
Simple form
I could not chlorinate you could not chlorinate he could not chlorinate we could not chlorinate you could not chlorinate they could not chlorinate
V-ing form
I could not be chlorinating you could not be chlorinating he could not be chlorinating we could not be chlorinating you could not be chlorinating they could not be chlorinating
Perfect
I could not have chlorinated you could not have chlorinated he could not have chlorinated we could not have chlorinated you could not have chlorinated they could not have chlorinated
V-ing perfect
I could not have been chlorinating you could not have been chlorinating he could not have been chlorinating we could not have been chlorinating you could not have been chlorinating they could not have been chlorinating
Interrogative form
Simple form
could I chlorinate? could you chlorinate? could he chlorinate? could we chlorinate? could you chlorinate? could they chlorinate?
V-ing form
could I be chlorinating? could you be chlorinating? could he be chlorinating? could we be chlorinating? could you be chlorinating? could they be chlorinating?
Perfect
could I have chlorinated? could you have chlorinated? could he have chlorinated? could we have chlorinated? could you have chlorinated? could they have chlorinated?
V-ing perfect
could I have been chlorinating? could you have been chlorinating? could he have been chlorinating? could we have been chlorinating? could you have been chlorinating? could they have been chlorinating?
Interro-negative form
Simple form
could I not chlorinate? could you not chlorinate? could he not chlorinate? could we not chlorinate? could you not chlorinate? could they not chlorinate?
V-ing form
could I not be chlorinating? could you not be chlorinating? could he not be chlorinating? could we not be chlorinating? could you not be chlorinating? could they not be chlorinating?
Perfect
could I not have chlorinated? could you not have chlorinated? could he not have chlorinated? could we not have chlorinated? could you not have chlorinated? could they not have chlorinated?
V-ing perfect
could I not have been chlorinating? could you not have been chlorinating? could he not have been chlorinating? could we not have been chlorinating? could you not have been chlorinating? could they not have been chlorinating?