I can scream you can scream she can scream we can scream you can scream they can scream
V-ing form
I can be screaming you can be screaming she can be screaming we can be screaming you can be screaming they can be screaming
Perfect
I can have screamed you can have screamed she can have screamed we can have screamed you can have screamed they can have screamed
V-ing perfect
I can have been screaming you can have been screaming she can have been screaming we can have been screaming you can have been screaming they can have been screaming
Negation
Simple form
I cannot scream you cannot scream she cannot scream we cannot scream you cannot scream they cannot scream
V-ing form
I cannot be screaming you cannot be screaming she cannot be screaming we cannot be screaming you cannot be screaming they cannot be screaming
Perfect
I cannot have screamed you cannot have screamed she cannot have screamed we cannot have screamed you cannot have screamed they cannot have screamed
V-ing perfect
I cannot have been screaming you cannot have been screaming she cannot have been screaming we cannot have been screaming you cannot have been screaming they cannot have been screaming
Interrogative form
Simple form
can I scream? can you scream? can she scream? can we scream? can you scream? can they scream?
V-ing form
can I be screaming? can you be screaming? can she be screaming? can we be screaming? can you be screaming? can they be screaming?
Perfect
can I have screamed? can you have screamed? can she have screamed? can we have screamed? can you have screamed? can they have screamed?
V-ing perfect
can I have been screaming? can you have been screaming? can she have been screaming? can we have been screaming? can you have been screaming? can they have been screaming?
Interro-negative form
Simple form
can I not scream? can you not scream? can she not scream? can we not scream? can you not scream? can they not scream?
V-ing form
can I not be screaming? can you not be screaming? can she not be screaming? can we not be screaming? can you not be screaming? can they not be screaming?
Perfect
can I not have screamed? can you not have screamed? can she not have screamed? can we not have screamed? can you not have screamed? can they not have screamed?
V-ing perfect
can I not have been screaming? can you not have been screaming? can she not have been screaming? can we not have been screaming? can you not have been screaming? can they not have been screaming?