English verb conjugation
COULD GROIN

Regular verb: groin - groined - groined

Affirmation

Simple form	V-ing form
I could groin you could groin he could groin we could groin you could groin they could groin	I could be groining you could be groining he could be groining we could be groining you could be groining they could be groining
Perfect	V-ing perfect
I could have groined you could have groined he could have groined we could have groined you could have groined they could have groined	I could have been groining you could have been groining he could have been groining we could have been groining you could have been groining they could have been groining

Negation

Simple form	V-ing form
I could not groin you could not groin he could not groin we could not groin you could not groin they could not groin	I could not be groining you could not be groining he could not be groining we could not be groining you could not be groining they could not be groining
Perfect	V-ing perfect
I could not have groined you could not have groined he could not have groined we could not have groined you could not have groined they could not have groined	I could not have been groining you could not have been groining he could not have been groining we could not have been groining you could not have been groining they could not have been groining

Interrogative form

Simple form	V-ing form
could I groin? could you groin? could he groin? could we groin? could you groin? could they groin?	could I be groining? could you be groining? could he be groining? could we be groining? could you be groining? could they be groining?
Perfect	V-ing perfect
could I have groined? could you have groined? could he have groined? could we have groined? could you have groined? could they have groined?	could I have been groining? could you have been groining? could he have been groining? could we have been groining? could you have been groining? could they have been groining?

Interro-negative form

Simple form	V-ing form
could I not groin? could you not groin? could he not groin? could we not groin? could you not groin? could they not groin?	could I not be groining? could you not be groining? could he not be groining? could we not be groining? could you not be groining? could they not be groining?
Perfect	V-ing perfect
could I not have groined? could you not have groined? could he not have groined? could we not have groined? could you not have groined? could they not have groined?	could I not have been groining? could you not have been groining? could he not have been groining? could we not have been groining? could you not have been groining? could they not have been groining?