English verb conjugation
COULD ROAR

Regular verb: roar - roared - roared

Affirmation

Simple form	V-ing form
I could roar you could roar he could roar we could roar you could roar they could roar	I could be roaring you could be roaring he could be roaring we could be roaring you could be roaring they could be roaring
Perfect	V-ing perfect
I could have roared you could have roared he could have roared we could have roared you could have roared they could have roared	I could have been roaring you could have been roaring he could have been roaring we could have been roaring you could have been roaring they could have been roaring

Negation

Simple form	V-ing form
I couldn't roar you couldn't roar he couldn't roar we couldn't roar you couldn't roar they couldn't roar	I couldn't be roaring you couldn't be roaring he couldn't be roaring we couldn't be roaring you couldn't be roaring they couldn't be roaring
Perfect	V-ing perfect
I couldn't have roared you couldn't have roared he couldn't have roared we couldn't have roared you couldn't have roared they couldn't have roared	I couldn't have been roaring you couldn't have been roaring he couldn't have been roaring we couldn't have been roaring you couldn't have been roaring they couldn't have been roaring

Interrogative form

Simple form	V-ing form
could I roar? could you roar? could he roar? could we roar? could you roar? could they roar?	could I be roaring? could you be roaring? could he be roaring? could we be roaring? could you be roaring? could they be roaring?
Perfect	V-ing perfect
could I have roared? could you have roared? could he have roared? could we have roared? could you have roared? could they have roared?	could I have been roaring? could you have been roaring? could he have been roaring? could we have been roaring? could you have been roaring? could they have been roaring?

Interro-negative form

Simple form	V-ing form
couldn't I roar? couldn't you roar? couldn't he roar? couldn't we roar? couldn't you roar? couldn't they roar?	couldn't I be roaring? couldn't you be roaring? couldn't he be roaring? couldn't we be roaring? couldn't you be roaring? couldn't they be roaring?
Perfect	V-ing perfect
couldn't I have roared? couldn't you have roared? couldn't he have roared? couldn't we have roared? couldn't you have roared? couldn't they have roared?	couldn't I have been roaring? couldn't you have been roaring? couldn't he have been roaring? couldn't we have been roaring? couldn't you have been roaring? couldn't they have been roaring?