I could interpermeate you could interpermeate he could interpermeate we could interpermeate you could interpermeate they could interpermeate
V-ing form
I could be interpermeating you could be interpermeating he could be interpermeating we could be interpermeating you could be interpermeating they could be interpermeating
Perfect
I could have interpermeated you could have interpermeated he could have interpermeated we could have interpermeated you could have interpermeated they could have interpermeated
V-ing perfect
I could have been interpermeating you could have been interpermeating he could have been interpermeating we could have been interpermeating you could have been interpermeating they could have been interpermeating
Negation
Simple form
I couldn't interpermeate you couldn't interpermeate he couldn't interpermeate we couldn't interpermeate you couldn't interpermeate they couldn't interpermeate
V-ing form
I couldn't be interpermeating you couldn't be interpermeating he couldn't be interpermeating we couldn't be interpermeating you couldn't be interpermeating they couldn't be interpermeating
Perfect
I couldn't have interpermeated you couldn't have interpermeated he couldn't have interpermeated we couldn't have interpermeated you couldn't have interpermeated they couldn't have interpermeated
V-ing perfect
I couldn't have been interpermeating you couldn't have been interpermeating he couldn't have been interpermeating we couldn't have been interpermeating you couldn't have been interpermeating they couldn't have been interpermeating
Interrogative form
Simple form
could I interpermeate? could you interpermeate? could he interpermeate? could we interpermeate? could you interpermeate? could they interpermeate?
V-ing form
could I be interpermeating? could you be interpermeating? could he be interpermeating? could we be interpermeating? could you be interpermeating? could they be interpermeating?
Perfect
could I have interpermeated? could you have interpermeated? could he have interpermeated? could we have interpermeated? could you have interpermeated? could they have interpermeated?
V-ing perfect
could I have been interpermeating? could you have been interpermeating? could he have been interpermeating? could we have been interpermeating? could you have been interpermeating? could they have been interpermeating?
Interro-negative form
Simple form
couldn't I interpermeate? couldn't you interpermeate? couldn't he interpermeate? couldn't we interpermeate? couldn't you interpermeate? couldn't they interpermeate?
V-ing form
couldn't I be interpermeating? couldn't you be interpermeating? couldn't he be interpermeating? couldn't we be interpermeating? couldn't you be interpermeating? couldn't they be interpermeating?
Perfect
couldn't I have interpermeated? couldn't you have interpermeated? couldn't he have interpermeated? couldn't we have interpermeated? couldn't you have interpermeated? couldn't they have interpermeated?
V-ing perfect
couldn't I have been interpermeating? couldn't you have been interpermeating? couldn't he have been interpermeating? couldn't we have been interpermeating? couldn't you have been interpermeating? couldn't they have been interpermeating?