I can leaflet you can leaflet he can leaflet we can leaflet you can leaflet they can leaflet
V-ing form
I can be leafleting you can be leafleting he can be leafleting we can be leafleting you can be leafleting they can be leafleting
Perfect
I can have leafleted you can have leafleted he can have leafleted we can have leafleted you can have leafleted they can have leafleted
V-ing perfect
I can have been leafleting you can have been leafleting he can have been leafleting we can have been leafleting you can have been leafleting they can have been leafleting
Negation
Simple form
I cannot leaflet you cannot leaflet he cannot leaflet we cannot leaflet you cannot leaflet they cannot leaflet
V-ing form
I cannot be leafleting you cannot be leafleting he cannot be leafleting we cannot be leafleting you cannot be leafleting they cannot be leafleting
Perfect
I cannot have leafleted you cannot have leafleted he cannot have leafleted we cannot have leafleted you cannot have leafleted they cannot have leafleted
V-ing perfect
I cannot have been leafleting you cannot have been leafleting he cannot have been leafleting we cannot have been leafleting you cannot have been leafleting they cannot have been leafleting
Interrogative form
Simple form
can I leaflet? can you leaflet? can he leaflet? can we leaflet? can you leaflet? can they leaflet?
V-ing form
can I be leafleting? can you be leafleting? can he be leafleting? can we be leafleting? can you be leafleting? can they be leafleting?
Perfect
can I have leafleted? can you have leafleted? can he have leafleted? can we have leafleted? can you have leafleted? can they have leafleted?
V-ing perfect
can I have been leafleting? can you have been leafleting? can he have been leafleting? can we have been leafleting? can you have been leafleting? can they have been leafleting?
Interro-negative form
Simple form
can I not leaflet? can you not leaflet? can he not leaflet? can we not leaflet? can you not leaflet? can they not leaflet?
V-ing form
can I not be leafleting? can you not be leafleting? can he not be leafleting? can we not be leafleting? can you not be leafleting? can they not be leafleting?
Perfect
can I not have leafleted? can you not have leafleted? can he not have leafleted? can we not have leafleted? can you not have leafleted? can they not have leafleted?
V-ing perfect
can I not have been leafleting? can you not have been leafleting? can he not have been leafleting? can we not have been leafleting? can you not have been leafleting? can they not have been leafleting?