I could sophisticate you could sophisticate he could sophisticate we could sophisticate you could sophisticate they could sophisticate
V-ing form
I could be sophisticating you could be sophisticating he could be sophisticating we could be sophisticating you could be sophisticating they could be sophisticating
Perfect
I could have sophisticated you could have sophisticated he 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 he 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 he 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 he 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 he 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 he 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 he sophisticate? could we sophisticate? could you sophisticate? could they sophisticate?
V-ing form
could I be sophisticating? could you be sophisticating? could he be sophisticating? could we be sophisticating? could you be sophisticating? could they be sophisticating?
Perfect
could I have sophisticated? could you have sophisticated? could he 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 he 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 he 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 he 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 he 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 he have been sophisticating? couldn't we have been sophisticating? couldn't you have been sophisticating? couldn't they have been sophisticating?