I can praise you can praise she can praise we can praise you can praise they can praise
V-ing form
I can be praising you can be praising she can be praising we can be praising you can be praising they can be praising
Perfect
I can have praised you can have praised she can have praised we can have praised you can have praised they can have praised
V-ing perfect
I can have been praising you can have been praising she can have been praising we can have been praising you can have been praising they can have been praising
Negation
Simple form
I can't praise you can't praise she can't praise we can't praise you can't praise they can't praise
V-ing form
I can't be praising you can't be praising she can't be praising we can't be praising you can't be praising they can't be praising
Perfect
I can't have praised you can't have praised she can't have praised we can't have praised you can't have praised they can't have praised
V-ing perfect
I can't have been praising you can't have been praising she can't have been praising we can't have been praising you can't have been praising they can't have been praising
Interrogative form
Simple form
can I praise? can you praise? can she praise? can we praise? can you praise? can they praise?
V-ing form
can I be praising? can you be praising? can she be praising? can we be praising? can you be praising? can they be praising?
Perfect
can I have praised? can you have praised? can she have praised? can we have praised? can you have praised? can they have praised?
V-ing perfect
can I have been praising? can you have been praising? can she have been praising? can we have been praising? can you have been praising? can they have been praising?
Interro-negative form
Simple form
can't I praise? can't you praise? can't she praise? can't we praise? can't you praise? can't they praise?
V-ing form
can't I be praising? can't you be praising? can't she be praising? can't we be praising? can't you be praising? can't they be praising?
Perfect
can't I have praised? can't you have praised? can't she have praised? can't we have praised? can't you have praised? can't they have praised?
V-ing perfect
can't I have been praising? can't you have been praising? can't she have been praising? can't we have been praising? can't you have been praising? can't they have been praising?