I can dog you can dog she can dog we can dog you can dog they can dog
V-ing form
I can be dogging you can be dogging she can be dogging we can be dogging you can be dogging they can be dogging
Perfect
I can have dogged you can have dogged she can have dogged we can have dogged you can have dogged they can have dogged
V-ing perfect
I can have been dogging you can have been dogging she can have been dogging we can have been dogging you can have been dogging they can have been dogging
Negation
Simple form
I cannot dog you cannot dog she cannot dog we cannot dog you cannot dog they cannot dog
V-ing form
I cannot be dogging you cannot be dogging she cannot be dogging we cannot be dogging you cannot be dogging they cannot be dogging
Perfect
I cannot have dogged you cannot have dogged she cannot have dogged we cannot have dogged you cannot have dogged they cannot have dogged
V-ing perfect
I cannot have been dogging you cannot have been dogging she cannot have been dogging we cannot have been dogging you cannot have been dogging they cannot have been dogging
Interrogative form
Simple form
can I dog? can you dog? can she dog? can we dog? can you dog? can they dog?
V-ing form
can I be dogging? can you be dogging? can she be dogging? can we be dogging? can you be dogging? can they be dogging?
Perfect
can I have dogged? can you have dogged? can she have dogged? can we have dogged? can you have dogged? can they have dogged?
V-ing perfect
can I have been dogging? can you have been dogging? can she have been dogging? can we have been dogging? can you have been dogging? can they have been dogging?
Interro-negative form
Simple form
can I not dog? can you not dog? can she not dog? can we not dog? can you not dog? can they not dog?
V-ing form
can I not be dogging? can you not be dogging? can she not be dogging? can we not be dogging? can you not be dogging? can they not be dogging?
Perfect
can I not have dogged? can you not have dogged? can she not have dogged? can we not have dogged? can you not have dogged? can they not have dogged?
V-ing perfect
can I not have been dogging? can you not have been dogging? can she not have been dogging? can we not have been dogging? can you not have been dogging? can they not have been dogging?