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