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