ought to titter
Regular verb: titter - tittered- tittered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to titter
you ought to titter
he ought to titter
we ought to titter
you ought to titter
they ought to titter 	I ought to be tittering
you ought to be tittering
he ought to be tittering
we ought to be tittering
you ought to be tittering
they ought to be tittering	I ought to have tittered
you ought to have tittered
he ought to have tittered
we ought to have tittered
you ought to have tittered
they ought to have tittered	I ought to have been tittering
you ought to have been tittering
he ought to have been tittering
we ought to have been tittering
you ought to have been tittering
they ought to have been tittering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to titter
you ought not to titter
he ought not to titter
we ought not to titter
you ought not to titter
they ought not to titter 	I ought not to tittering
you ought not to tittering
he ought not to tittering
we ought not to tittering
you ought not to tittering
they ought not to tittering	I ought not to have tittered
you ought not to have tittered
he ought not to have tittered
we ought not to have tittered
you ought not to have tittered
they ought not to have tittered	I ought not to have been tittering
you ought not to have been tittering
he ought not to have been tittering
we ought not to have been tittering
you ought not to have been tittering
they ought not to have been tittering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I titter?
ought to you titter?
ought to he titter?
ought to we titter?
ought to you titter?
ought to they titter? 	ought to I be tittering?
ought to you be tittering?
ought to he be tittering?
ought to we be tittering?
ought to you be tittering?
ought to they be tittering? 	ought to I have tittered?
ought to you have tittered?
ought to he have tittered?
ought to we have tittered?
ought to you have tittered?
ought to they have tittered? 	ought to I have been tittering?
ought to you have been tittering?
ought to he have been tittering?
ought to we have been tittering?
ought to you have been tittering?
ought to they have been tittering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to titter?
ought you not to titter?
ought he not to titter?
ought we not to titter?
ought you not to titter?
ought they not to titter? 	ought I not to be tittering?
ought you not to be tittering?
ought he not to be tittering?
ought we not to be tittering?
ought you not to be tittering?
ought they not to be tittering? 	ought I not to have tittered?
ought you not to have tittered?
ought he not to have tittered?
ought we not to have tittered?
ought you not to have tittered?
ought they not to have tittered? 	ought I not to have been tittering?
ought you not to have been tittering?
ought he not to have been tittering?
ought we not to have been tittering?
ought you not to have been tittering?
ought they not to have been tittering?