ought to howl
Regular verb: howl - howled- howled

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

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

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

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