should howl
Regular verb: howl - howled- howled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should howl
you should howl
he should howl
we should howl
you should howl
they should howl 	I should be howling
you should be howling
he should be howling
we should be howling
you should be howling
they should be howling	I should have howled
you should have howled
he should have howled
we should have howled
you should have howled
they should have howled	I should have been howling
you should have been howling
he should have been howling
we should have been howling
you should have been howling
they should have been howling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I should not howl
you should not howl
he should not howl
we should not howl
you should not howl
they should not howl 	I should not be howling
you should not be howling
he should not be howling
we should not be howling
you should not be howling
they should not be howling	I should not have howled
you should not have howled
he should not have howled
we should not have howled
you should not have howled
they should not have howled	I should not have been howling
you should not have been howling
he should not have been howling
we should not have been howling
you should not have been howling
they should not have been howling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I howl?
should you howl?
should he howl?
should we howl?
should you howl?
should they howl? 	should I be howling?
should you be howling?
should he be howling?
should we be howling?
should you be howling?
should they be howling? 	should I have howled?
should you have howled?
should he have howled?
should we have howled?
should you have howled?
should they have howled? 	should I have been howling?
should you have been howling?
should he have been howling?
should we have been howling?
should you have been howling?
should they have been howling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I not howl?
should you not howl?
should he not howl?
should we not howl?
should you not howl?
should they not howl? 	should I not be howling?
should you not be howling?
should he not be howling?
should we not be howling?
should you not be howling?
should they not be howling? 	should I not have howled?
should you not have howled?
should he not have howled?
should we not have howled?
should you not have howled?
should they not have howled? 	should I not have been howling?
should you not have been howling?
should he not have been howling?
should we not have been howling?
should you not have been howling?
should they not have been howling?