English verb conjugation
COULD YEAST

Regular verb: yeast - yeasted - yeasted

Affirmation

Simple form	V-ing form
I could yeast you could yeast she could yeast we could yeast you could yeast they could yeast	I could be yeasting you could be yeasting she 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 she 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 she 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 couldn't yeast you couldn't yeast she couldn't yeast we couldn't yeast you couldn't yeast they couldn't yeast	I couldn't be yeasting you couldn't be yeasting she couldn't be yeasting we couldn't be yeasting you couldn't be yeasting they couldn't be yeasting
Perfect	V-ing perfect
I couldn't have yeasted you couldn't have yeasted she couldn't have yeasted we couldn't have yeasted you couldn't have yeasted they couldn't have yeasted	I couldn't have been yeasting you couldn't have been yeasting she couldn't have been yeasting we couldn't have been yeasting you couldn't have been yeasting they couldn't have been yeasting

Interrogative form

Simple form	V-ing form
could I yeast? could you yeast? could she yeast? could we yeast? could you yeast? could they yeast?	could I be yeasting? could you be yeasting? could she 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 she 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 she 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
couldn't I yeast? couldn't you yeast? couldn't she yeast? couldn't we yeast? couldn't you yeast? couldn't they yeast?	couldn't I be yeasting? couldn't you be yeasting? couldn't she be yeasting? couldn't we be yeasting? couldn't you be yeasting? couldn't they be yeasting?
Perfect	V-ing perfect
couldn't I have yeasted? couldn't you have yeasted? couldn't she have yeasted? couldn't we have yeasted? couldn't you have yeasted? couldn't they have yeasted?	couldn't I have been yeasting? couldn't you have been yeasting? couldn't she have been yeasting? couldn't we have been yeasting? couldn't you have been yeasting? couldn't they have been yeasting?