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