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 couldn't procreate you couldn't procreate he couldn't procreate we couldn't procreate you couldn't procreate they couldn't procreate
V-ing form
I couldn't be procreating you couldn't be procreating he couldn't be procreating we couldn't be procreating you couldn't be procreating they couldn't be procreating
Perfect
I couldn't have procreated you couldn't have procreated he couldn't have procreated we couldn't have procreated you couldn't have procreated they couldn't have procreated
V-ing perfect
I couldn't have been procreating you couldn't have been procreating he couldn't have been procreating we couldn't have been procreating you couldn't have been procreating they couldn't 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
couldn't I procreate? couldn't you procreate? couldn't he procreate? couldn't we procreate? couldn't you procreate? couldn't they procreate?
V-ing form
couldn't I be procreating? couldn't you be procreating? couldn't he be procreating? couldn't we be procreating? couldn't you be procreating? couldn't they be procreating?
Perfect
couldn't I have procreated? couldn't you have procreated? couldn't he have procreated? couldn't we have procreated? couldn't you have procreated? couldn't they have procreated?
V-ing perfect
couldn't I have been procreating? couldn't you have been procreating? couldn't he have been procreating? couldn't we have been procreating? couldn't you have been procreating? couldn't they have been procreating?