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