English verb conjugation
COULD SHOWCASE

Regular verb: showcase - showcased - showcased

Affirmation

Simple form	V-ing form
I could showcase you could showcase he could showcase we could showcase you could showcase they could showcase	I could be showcasing you could be showcasing he could be showcasing we could be showcasing you could be showcasing they could be showcasing
Perfect	V-ing perfect
I could have showcased you could have showcased he could have showcased we could have showcased you could have showcased they could have showcased	I could have been showcasing you could have been showcasing he could have been showcasing we could have been showcasing you could have been showcasing they could have been showcasing

Negation

Simple form	V-ing form
I couldn't showcase you couldn't showcase he couldn't showcase we couldn't showcase you couldn't showcase they couldn't showcase	I couldn't be showcasing you couldn't be showcasing he couldn't be showcasing we couldn't be showcasing you couldn't be showcasing they couldn't be showcasing
Perfect	V-ing perfect
I couldn't have showcased you couldn't have showcased he couldn't have showcased we couldn't have showcased you couldn't have showcased they couldn't have showcased	I couldn't have been showcasing you couldn't have been showcasing he couldn't have been showcasing we couldn't have been showcasing you couldn't have been showcasing they couldn't have been showcasing

Interrogative form

Simple form	V-ing form
could I showcase? could you showcase? could he showcase? could we showcase? could you showcase? could they showcase?	could I be showcasing? could you be showcasing? could he be showcasing? could we be showcasing? could you be showcasing? could they be showcasing?
Perfect	V-ing perfect
could I have showcased? could you have showcased? could he have showcased? could we have showcased? could you have showcased? could they have showcased?	could I have been showcasing? could you have been showcasing? could he have been showcasing? could we have been showcasing? could you have been showcasing? could they have been showcasing?

Interro-negative form

Simple form	V-ing form
couldn't I showcase? couldn't you showcase? couldn't he showcase? couldn't we showcase? couldn't you showcase? couldn't they showcase?	couldn't I be showcasing? couldn't you be showcasing? couldn't he be showcasing? couldn't we be showcasing? couldn't you be showcasing? couldn't they be showcasing?
Perfect	V-ing perfect
couldn't I have showcased? couldn't you have showcased? couldn't he have showcased? couldn't we have showcased? couldn't you have showcased? couldn't they have showcased?	couldn't I have been showcasing? couldn't you have been showcasing? couldn't he have been showcasing? couldn't we have been showcasing? couldn't you have been showcasing? couldn't they have been showcasing?