I could complicate you could complicate she could complicate we could complicate you could complicate they could complicate
V-ing form
I could be complicating you could be complicating she could be complicating we could be complicating you could be complicating they could be complicating
Perfect
I could have complicated you could have complicated she could have complicated we could have complicated you could have complicated they could have complicated
V-ing perfect
I could have been complicating you could have been complicating she could have been complicating we could have been complicating you could have been complicating they could have been complicating
Negation
Simple form
I could not complicate you could not complicate she could not complicate we could not complicate you could not complicate they could not complicate
V-ing form
I could not be complicating you could not be complicating she could not be complicating we could not be complicating you could not be complicating they could not be complicating
Perfect
I could not have complicated you could not have complicated she could not have complicated we could not have complicated you could not have complicated they could not have complicated
V-ing perfect
I could not have been complicating you could not have been complicating she could not have been complicating we could not have been complicating you could not have been complicating they could not have been complicating
Interrogative form
Simple form
could I complicate? could you complicate? could she complicate? could we complicate? could you complicate? could they complicate?
V-ing form
could I be complicating? could you be complicating? could she be complicating? could we be complicating? could you be complicating? could they be complicating?
Perfect
could I have complicated? could you have complicated? could she have complicated? could we have complicated? could you have complicated? could they have complicated?
V-ing perfect
could I have been complicating? could you have been complicating? could she have been complicating? could we have been complicating? could you have been complicating? could they have been complicating?
Interro-negative form
Simple form
could I not complicate? could you not complicate? could she not complicate? could we not complicate? could you not complicate? could they not complicate?
V-ing form
could I not be complicating? could you not be complicating? could she not be complicating? could we not be complicating? could you not be complicating? could they not be complicating?
Perfect
could I not have complicated? could you not have complicated? could she not have complicated? could we not have complicated? could you not have complicated? could they not have complicated?
V-ing perfect
could I not have been complicating? could you not have been complicating? could she not have been complicating? could we not have been complicating? could you not have been complicating? could they not have been complicating?