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