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
she 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
she 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
she 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
she 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 ought not to strum
you ought not to strum
she ought not to strum
we ought not to strum
you ought not to strum
they ought not to strum 	I ought not to strumming
you ought not to strumming
she ought not to strumming
we ought not to strumming
you ought not to strumming
they ought not to strumming	I ought not to have strummed
you ought not to have strummed
she ought not to have strummed
we ought not to have strummed
you ought not to have strummed
they ought not to have strummed	I ought not to have been strumming
you ought not to have been strumming
she ought not to have been strumming
we ought not to have been strumming
you ought not to have been strumming
they ought not 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 she 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 she 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 she 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 she 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 	
ought I not to strum?
ought you not to strum?
ought she not to strum?
ought we not to strum?
ought you not to strum?
ought they not to strum? 	ought I not to be strumming?
ought you not to be strumming?
ought she not to be strumming?
ought we not to be strumming?
ought you not to be strumming?
ought they not to be strumming? 	ought I not to have strummed?
ought you not to have strummed?
ought she not to have strummed?
ought we not to have strummed?
ought you not to have strummed?
ought they not to have strummed? 	ought I not to have been strumming?
ought you not to have been strumming?
ought she not to have been strumming?
ought we not to have been strumming?
ought you not to have been strumming?
ought they not to have been strumming?