ought to shudder
Regular verb: shudder - shuddered- shuddered

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to shudder
you ought to shudder
he ought to shudder
we ought to shudder
you ought to shudder
they ought to shudder 	I ought to be shuddering
you ought to be shuddering
he ought to be shuddering
we ought to be shuddering
you ought to be shuddering
they ought to be shuddering	I ought to have shuddered
you ought to have shuddered
he ought to have shuddered
we ought to have shuddered
you ought to have shuddered
they ought to have shuddered	I ought to have been shuddering
you ought to have been shuddering
he ought to have been shuddering
we ought to have been shuddering
you ought to have been shuddering
they ought to have been shuddering	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to shudder
you oughtn't to shudder
he oughtn't to shudder
we oughtn't to shudder
you oughtn't to shudder
they oughtn't to shudder 	I oughtn't to be shuddering
you oughtn't to be shuddering
he oughtn't to be shuddering
we oughtn't to be shuddering
you oughtn't to be shuddering
they oughtn't to be shuddering	I oughtn't to have shuddered
you oughtn't to have shuddered
he oughtn't to have shuddered
we oughtn't to have shuddered
you oughtn't to have shuddered
they oughtn't to have shuddered	I oughtn't to have been shuddering
you oughtn't to have been shuddering
he oughtn't to have been shuddering
we oughtn't to have been shuddering
you oughtn't to have been shuddering
they oughtn't to have been shuddering	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I shudder?
ought to you shudder?
ought to he shudder?
ought to we shudder?
ought to you shudder?
ought to they shudder? 	ought to I be shuddering?
ought to you be shuddering?
ought to he be shuddering?
ought to we be shuddering?
ought to you be shuddering?
ought to they be shuddering? 	ought to I have shuddered?
ought to you have shuddered?
ought to he have shuddered?
ought to we have shuddered?
ought to you have shuddered?
ought to they have shuddered? 	ought to I have been shuddering?
ought to you have been shuddering?
ought to he have been shuddering?
ought to we have been shuddering?
ought to you have been shuddering?
ought to they have been shuddering? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to shudder?
oughtn't you to shudder?
oughtn't he to shudder?
oughtn't we to shudder?
oughtn't you to shudder?
oughtn't they to shudder? 	oughtn't I to be shuddering?
oughtn't you to be shuddering?
oughtn't he to be shuddering?
oughtn't we to be shuddering?
oughtn't you to be shuddering?
oughtn't they to be shuddering? 	oughtn't I to have shuddered?
oughtn't you to have shuddered?
oughtn't he to have shuddered?
oughtn't we to have shuddered?
oughtn't you to have shuddered?
oughtn't they to have shuddered? 	oughtn't I to have been shuddering?
oughtn't you to have been shuddering?
oughtn't he to have been shuddering?
oughtn't we to have been shuddering?
oughtn't you to have been shuddering?
oughtn't they to have been shuddering?