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