I could mispronounce you could mispronounce he could mispronounce we could mispronounce you could mispronounce they could mispronounce
V-ing form
I could be mispronouncing you could be mispronouncing he could be mispronouncing we could be mispronouncing you could be mispronouncing they could be mispronouncing
Perfect
I could have mispronounced you could have mispronounced he could have mispronounced we could have mispronounced you could have mispronounced they could have mispronounced
V-ing perfect
I could have been mispronouncing you could have been mispronouncing he could have been mispronouncing we could have been mispronouncing you could have been mispronouncing they could have been mispronouncing
Negation
Simple form
I couldn't mispronounce you couldn't mispronounce he couldn't mispronounce we couldn't mispronounce you couldn't mispronounce they couldn't mispronounce
V-ing form
I couldn't be mispronouncing you couldn't be mispronouncing he couldn't be mispronouncing we couldn't be mispronouncing you couldn't be mispronouncing they couldn't be mispronouncing
Perfect
I couldn't have mispronounced you couldn't have mispronounced he couldn't have mispronounced we couldn't have mispronounced you couldn't have mispronounced they couldn't have mispronounced
V-ing perfect
I couldn't have been mispronouncing you couldn't have been mispronouncing he couldn't have been mispronouncing we couldn't have been mispronouncing you couldn't have been mispronouncing they couldn't have been mispronouncing
Interrogative form
Simple form
could I mispronounce? could you mispronounce? could he mispronounce? could we mispronounce? could you mispronounce? could they mispronounce?
V-ing form
could I be mispronouncing? could you be mispronouncing? could he be mispronouncing? could we be mispronouncing? could you be mispronouncing? could they be mispronouncing?
Perfect
could I have mispronounced? could you have mispronounced? could he have mispronounced? could we have mispronounced? could you have mispronounced? could they have mispronounced?
V-ing perfect
could I have been mispronouncing? could you have been mispronouncing? could he have been mispronouncing? could we have been mispronouncing? could you have been mispronouncing? could they have been mispronouncing?
Interro-negative form
Simple form
couldn't I mispronounce? couldn't you mispronounce? couldn't he mispronounce? couldn't we mispronounce? couldn't you mispronounce? couldn't they mispronounce?
V-ing form
couldn't I be mispronouncing? couldn't you be mispronouncing? couldn't he be mispronouncing? couldn't we be mispronouncing? couldn't you be mispronouncing? couldn't they be mispronouncing?
Perfect
couldn't I have mispronounced? couldn't you have mispronounced? couldn't he have mispronounced? couldn't we have mispronounced? couldn't you have mispronounced? couldn't they have mispronounced?
V-ing perfect
couldn't I have been mispronouncing? couldn't you have been mispronouncing? couldn't he have been mispronouncing? couldn't we have been mispronouncing? couldn't you have been mispronouncing? couldn't they have been mispronouncing?