ought to strum
Regular verb: strum - strummed- strummed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to strum
you ought to strum
he ought to strum
we ought to strum
you ought to strum
they ought to strum 	I ought to be strumming
you ought to be strumming
he ought to be strumming
we ought to be strumming
you ought to be strumming
they ought to be strumming	I ought to have strummed
you ought to have strummed
he ought to have strummed
we ought to have strummed
you ought to have strummed
they ought to have strummed	I ought to have been strumming
you ought to have been strumming
he ought to have been strumming
we ought to have been strumming
you ought to have been strumming
they ought to have been strumming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I oughtn't to strum
you oughtn't to strum
he oughtn't to strum
we oughtn't to strum
you oughtn't to strum
they oughtn't to strum 	I oughtn't to be strumming
you oughtn't to be strumming
he oughtn't to be strumming
we oughtn't to be strumming
you oughtn't to be strumming
they oughtn't to be strumming	I oughtn't to have strummed
you oughtn't to have strummed
he oughtn't to have strummed
we oughtn't to have strummed
you oughtn't to have strummed
they oughtn't to have strummed	I oughtn't to have been strumming
you oughtn't to have been strumming
he oughtn't to have been strumming
we oughtn't to have been strumming
you oughtn't to have been strumming
they oughtn't to have been strumming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I strum?
ought to you strum?
ought to he strum?
ought to we strum?
ought to you strum?
ought to they strum? 	ought to I be strumming?
ought to you be strumming?
ought to he be strumming?
ought to we be strumming?
ought to you be strumming?
ought to they be strumming? 	ought to I have strummed?
ought to you have strummed?
ought to he have strummed?
ought to we have strummed?
ought to you have strummed?
ought to they have strummed? 	ought to I have been strumming?
ought to you have been strumming?
ought to he have been strumming?
ought to we have been strumming?
ought to you have been strumming?
ought to they have been strumming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
oughtn't I to strum?
oughtn't you to strum?
oughtn't he to strum?
oughtn't we to strum?
oughtn't you to strum?
oughtn't they to strum? 	oughtn't I to be strumming?
oughtn't you to be strumming?
oughtn't he to be strumming?
oughtn't we to be strumming?
oughtn't you to be strumming?
oughtn't they to be strumming? 	oughtn't I to have strummed?
oughtn't you to have strummed?
oughtn't he to have strummed?
oughtn't we to have strummed?
oughtn't you to have strummed?
oughtn't they to have strummed? 	oughtn't I to have been strumming?
oughtn't you to have been strumming?
oughtn't he to have been strumming?
oughtn't we to have been strumming?
oughtn't you to have been strumming?
oughtn't they to have been strumming?