English verb conjugation
CAN SCREAM

Regular verb: scream - screamed - screamed

Affirmation

Simple form	V-ing form
I can scream you can scream he can scream we can scream you can scream they can scream	I can be screaming you can be screaming he can be screaming we can be screaming you can be screaming they can be screaming
Perfect	V-ing perfect
I can have screamed you can have screamed he can have screamed we can have screamed you can have screamed they can have screamed	I can have been screaming you can have been screaming he can have been screaming we can have been screaming you can have been screaming they can have been screaming

Negation

Simple form	V-ing form
I cannot scream you cannot scream he cannot scream we cannot scream you cannot scream they cannot scream	I cannot be screaming you cannot be screaming he cannot be screaming we cannot be screaming you cannot be screaming they cannot be screaming
Perfect	V-ing perfect
I cannot have screamed you cannot have screamed he cannot have screamed we cannot have screamed you cannot have screamed they cannot have screamed	I cannot have been screaming you cannot have been screaming he cannot have been screaming we cannot have been screaming you cannot have been screaming they cannot have been screaming

Interrogative form

Simple form	V-ing form
can I scream? can you scream? can he scream? can we scream? can you scream? can they scream?	can I be screaming? can you be screaming? can he be screaming? can we be screaming? can you be screaming? can they be screaming?
Perfect	V-ing perfect
can I have screamed? can you have screamed? can he have screamed? can we have screamed? can you have screamed? can they have screamed?	can I have been screaming? can you have been screaming? can he have been screaming? can we have been screaming? can you have been screaming? can they have been screaming?

Interro-negative form

Simple form	V-ing form
can I not scream? can you not scream? can he not scream? can we not scream? can you not scream? can they not scream?	can I not be screaming? can you not be screaming? can he not be screaming? can we not be screaming? can you not be screaming? can they not be screaming?
Perfect	V-ing perfect
can I not have screamed? can you not have screamed? can he not have screamed? can we not have screamed? can you not have screamed? can they not have screamed?	can I not have been screaming? can you not have been screaming? can he not have been screaming? can we not have been screaming? can you not have been screaming? can they not have been screaming?