should hiss
Regular verb: hiss - hissed- hissed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should hiss
you should hiss
he should hiss
we should hiss
you should hiss
they should hiss 	I should be hissing
you should be hissing
he should be hissing
we should be hissing
you should be hissing
they should be hissing	I should have hissed
you should have hissed
he should have hissed
we should have hissed
you should have hissed
they should have hissed	I should have been hissing
you should have been hissing
he should have been hissing
we should have been hissing
you should have been hissing
they should have been hissing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not hiss
you should not hiss
he should not hiss
we should not hiss
you should not hiss
they should not hiss 	I should not be hissing
you should not be hissing
he should not be hissing
we should not be hissing
you should not be hissing
they should not be hissing	I should not have hissed
you should not have hissed
he should not have hissed
we should not have hissed
you should not have hissed
they should not have hissed	I should not have been hissing
you should not have been hissing
he should not have been hissing
we should not have been hissing
you should not have been hissing
they should not have been hissing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I hiss?
should you hiss?
should he hiss?
should we hiss?
should you hiss?
should they hiss? 	should I be hissing?
should you be hissing?
should he be hissing?
should we be hissing?
should you be hissing?
should they be hissing? 	should I have hissed?
should you have hissed?
should he have hissed?
should we have hissed?
should you have hissed?
should they have hissed? 	should I have been hissing?
should you have been hissing?
should he have been hissing?
should we have been hissing?
should you have been hissing?
should they have been hissing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not hiss?
should you not hiss?
should he not hiss?
should we not hiss?
should you not hiss?
should they not hiss? 	should I not be hissing?
should you not be hissing?
should he not be hissing?
should we not be hissing?
should you not be hissing?
should they not be hissing? 	should I not have hissed?
should you not have hissed?
should he not have hissed?
should we not have hissed?
should you not have hissed?
should they not have hissed? 	should I not have been hissing?
should you not have been hissing?
should he not have been hissing?
should we not have been hissing?
should you not have been hissing?
should they not have been hissing?