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