I could engender you could engender he could engender we could engender you could engender they could engender
V-ing form
I could be engendering you could be engendering he could be engendering we could be engendering you could be engendering they could be engendering
Perfect
I could have engendered you could have engendered he could have engendered we could have engendered you could have engendered they could have engendered
V-ing perfect
I could have been engendering you could have been engendering he could have been engendering we could have been engendering you could have been engendering they could have been engendering
Negation
Simple form
I could not engender you could not engender he could not engender we could not engender you could not engender they could not engender
V-ing form
I could not be engendering you could not be engendering he could not be engendering we could not be engendering you could not be engendering they could not be engendering
Perfect
I could not have engendered you could not have engendered he could not have engendered we could not have engendered you could not have engendered they could not have engendered
V-ing perfect
I could not have been engendering you could not have been engendering he could not have been engendering we could not have been engendering you could not have been engendering they could not have been engendering
Interrogative form
Simple form
could I engender? could you engender? could he engender? could we engender? could you engender? could they engender?
V-ing form
could I be engendering? could you be engendering? could he be engendering? could we be engendering? could you be engendering? could they be engendering?
Perfect
could I have engendered? could you have engendered? could he have engendered? could we have engendered? could you have engendered? could they have engendered?
V-ing perfect
could I have been engendering? could you have been engendering? could he have been engendering? could we have been engendering? could you have been engendering? could they have been engendering?
Interro-negative form
Simple form
could I not engender? could you not engender? could he not engender? could we not engender? could you not engender? could they not engender?
V-ing form
could I not be engendering? could you not be engendering? could he not be engendering? could we not be engendering? could you not be engendering? could they not be engendering?
Perfect
could I not have engendered? could you not have engendered? could he not have engendered? could we not have engendered? could you not have engendered? could they not have engendered?
V-ing perfect
could I not have been engendering? could you not have been engendering? could he not have been engendering? could we not have been engendering? could you not have been engendering? could they not have been engendering?