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