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