English verb conjugation
CAN ROAR

Regular verb: roar - roared - roared

Affirmation

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

Negation

Simple form	V-ing form
I cannot roar you cannot roar she cannot roar we cannot roar you cannot roar they cannot roar	I cannot be roaring you cannot be roaring she cannot be roaring we cannot be roaring you cannot be roaring they cannot be roaring
Perfect	V-ing perfect
I cannot have roared you cannot have roared she cannot have roared we cannot have roared you cannot have roared they cannot have roared	I cannot have been roaring you cannot have been roaring she cannot have been roaring we cannot have been roaring you cannot have been roaring they cannot have been roaring

Interrogative form

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

Interro-negative form

Simple form	V-ing form
can I not roar? can you not roar? can she not roar? can we not roar? can you not roar? can they not roar?	can I not be roaring? can you not be roaring? can she not be roaring? can we not be roaring? can you not be roaring? can they not be roaring?
Perfect	V-ing perfect
can I not have roared? can you not have roared? can she not have roared? can we not have roared? can you not have roared? can they not have roared?	can I not have been roaring? can you not have been roaring? can she not have been roaring? can we not have been roaring? can you not have been roaring? can they not have been roaring?