English verb conjugation
COULD YEAST

Regular verb: yeast - yeasted - yeasted

Affirmation

Simple form	V-ing form
I could yeast you could yeast he could yeast we could yeast you could yeast they could yeast	I could be yeasting you could be yeasting he could be yeasting we could be yeasting you could be yeasting they could be yeasting
Perfect	V-ing perfect
I could have yeasted you could have yeasted he could have yeasted we could have yeasted you could have yeasted they could have yeasted	I could have been yeasting you could have been yeasting he could have been yeasting we could have been yeasting you could have been yeasting they could have been yeasting

Negation

Simple form	V-ing form
I could not yeast you could not yeast he could not yeast we could not yeast you could not yeast they could not yeast	I could not be yeasting you could not be yeasting he could not be yeasting we could not be yeasting you could not be yeasting they could not be yeasting
Perfect	V-ing perfect
I could not have yeasted you could not have yeasted he could not have yeasted we could not have yeasted you could not have yeasted they could not have yeasted	I could not have been yeasting you could not have been yeasting he could not have been yeasting we could not have been yeasting you could not have been yeasting they could not have been yeasting

Interrogative form

Simple form	V-ing form
could I yeast? could you yeast? could he yeast? could we yeast? could you yeast? could they yeast?	could I be yeasting? could you be yeasting? could he be yeasting? could we be yeasting? could you be yeasting? could they be yeasting?
Perfect	V-ing perfect
could I have yeasted? could you have yeasted? could he have yeasted? could we have yeasted? could you have yeasted? could they have yeasted?	could I have been yeasting? could you have been yeasting? could he have been yeasting? could we have been yeasting? could you have been yeasting? could they have been yeasting?

Interro-negative form

Simple form	V-ing form
could I not yeast? could you not yeast? could he not yeast? could we not yeast? could you not yeast? could they not yeast?	could I not be yeasting? could you not be yeasting? could he not be yeasting? could we not be yeasting? could you not be yeasting? could they not be yeasting?
Perfect	V-ing perfect
could I not have yeasted? could you not have yeasted? could he not have yeasted? could we not have yeasted? could you not have yeasted? could they not have yeasted?	could I not have been yeasting? could you not have been yeasting? could he not have been yeasting? could we not have been yeasting? could you not have been yeasting? could they not have been yeasting?