I could sophisticate you could sophisticate she could sophisticate we could sophisticate you could sophisticate they could sophisticate
V-ing form
I could be sophisticating you could be sophisticating she could be sophisticating we could be sophisticating you could be sophisticating they could be sophisticating
Perfect
I could have sophisticated you could have sophisticated she could have sophisticated we could have sophisticated you could have sophisticated they could have sophisticated
V-ing perfect
I could have been sophisticating you could have been sophisticating she could have been sophisticating we could have been sophisticating you could have been sophisticating they could have been sophisticating
Negation
Simple form
I couldn't sophisticate you couldn't sophisticate she couldn't sophisticate we couldn't sophisticate you couldn't sophisticate they couldn't sophisticate
V-ing form
I couldn't be sophisticating you couldn't be sophisticating she couldn't be sophisticating we couldn't be sophisticating you couldn't be sophisticating they couldn't be sophisticating
Perfect
I couldn't have sophisticated you couldn't have sophisticated she couldn't have sophisticated we couldn't have sophisticated you couldn't have sophisticated they couldn't have sophisticated
V-ing perfect
I couldn't have been sophisticating you couldn't have been sophisticating she couldn't have been sophisticating we couldn't have been sophisticating you couldn't have been sophisticating they couldn't have been sophisticating
Interrogative form
Simple form
could I sophisticate? could you sophisticate? could she sophisticate? could we sophisticate? could you sophisticate? could they sophisticate?
V-ing form
could I be sophisticating? could you be sophisticating? could she be sophisticating? could we be sophisticating? could you be sophisticating? could they be sophisticating?
Perfect
could I have sophisticated? could you have sophisticated? could she have sophisticated? could we have sophisticated? could you have sophisticated? could they have sophisticated?
V-ing perfect
could I have been sophisticating? could you have been sophisticating? could she have been sophisticating? could we have been sophisticating? could you have been sophisticating? could they have been sophisticating?
Interro-negative form
Simple form
couldn't I sophisticate? couldn't you sophisticate? couldn't she sophisticate? couldn't we sophisticate? couldn't you sophisticate? couldn't they sophisticate?
V-ing form
couldn't I be sophisticating? couldn't you be sophisticating? couldn't she be sophisticating? couldn't we be sophisticating? couldn't you be sophisticating? couldn't they be sophisticating?
Perfect
couldn't I have sophisticated? couldn't you have sophisticated? couldn't she have sophisticated? couldn't we have sophisticated? couldn't you have sophisticated? couldn't they have sophisticated?
V-ing perfect
couldn't I have been sophisticating? couldn't you have been sophisticating? couldn't she have been sophisticating? couldn't we have been sophisticating? couldn't you have been sophisticating? couldn't they have been sophisticating?