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