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