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