I could conduct you could conduct she could conduct we could conduct you could conduct they could conduct
V-ing form
I could be conducting you could be conducting she could be conducting we could be conducting you could be conducting they could be conducting
Perfect
I could have conducted you could have conducted she 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 she 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 she 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 she 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 she 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 she 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 she conduct? could we conduct? could you conduct? could they conduct?
V-ing form
could I be conducting? could you be conducting? could she be conducting? could we be conducting? could you be conducting? could they be conducting?
Perfect
could I have conducted? could you have conducted? could she 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 she 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 she 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 she 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 she 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 she have been conducting? couldn't we have been conducting? couldn't you have been conducting? couldn't they have been conducting?