I could procreate you could procreate she could procreate we could procreate you could procreate they could procreate
V-ing form
I could be procreating you could be procreating she could be procreating we could be procreating you could be procreating they could be procreating
Perfect
I could have procreated you could have procreated she could have procreated we could have procreated you could have procreated they could have procreated
V-ing perfect
I could have been procreating you could have been procreating she could have been procreating we could have been procreating you could have been procreating they could have been procreating
Negation
Simple form
I could not procreate you could not procreate she could not procreate we could not procreate you could not procreate they could not procreate
V-ing form
I could not be procreating you could not be procreating she could not be procreating we could not be procreating you could not be procreating they could not be procreating
Perfect
I could not have procreated you could not have procreated she could not have procreated we could not have procreated you could not have procreated they could not have procreated
V-ing perfect
I could not have been procreating you could not have been procreating she could not have been procreating we could not have been procreating you could not have been procreating they could not have been procreating
Interrogative form
Simple form
could I procreate? could you procreate? could she procreate? could we procreate? could you procreate? could they procreate?
V-ing form
could I be procreating? could you be procreating? could she be procreating? could we be procreating? could you be procreating? could they be procreating?
Perfect
could I have procreated? could you have procreated? could she have procreated? could we have procreated? could you have procreated? could they have procreated?
V-ing perfect
could I have been procreating? could you have been procreating? could she have been procreating? could we have been procreating? could you have been procreating? could they have been procreating?
Interro-negative form
Simple form
could I not procreate? could you not procreate? could she not procreate? could we not procreate? could you not procreate? could they not procreate?
V-ing form
could I not be procreating? could you not be procreating? could she not be procreating? could we not be procreating? could you not be procreating? could they not be procreating?
Perfect
could I not have procreated? could you not have procreated? could she not have procreated? could we not have procreated? could you not have procreated? could they not have procreated?
V-ing perfect
could I not have been procreating? could you not have been procreating? could she not have been procreating? could we not have been procreating? could you not have been procreating? could they not have been procreating?