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