I could procreate you could procreate he could procreate we could procreate you could procreate they could procreate
V-ing form
I could be procreating you could be procreating he could be procreating we could be procreating you could be procreating they could be procreating
Perfect
I could have procreated you could have procreated he 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 he 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 he 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 he 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 he 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 he 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 he procreate? could we procreate? could you procreate? could they procreate?
V-ing form
could I be procreating? could you be procreating? could he be procreating? could we be procreating? could you be procreating? could they be procreating?
Perfect
could I have procreated? could you have procreated? could he 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 he 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 he 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 he 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 he 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 he not have been procreating? could we not have been procreating? could you not have been procreating? could they not have been procreating?