ought to underestimate
Regular verb: underestimate - underestimated- underestimated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to underestimate
you ought to underestimate
he ought to underestimate
we ought to underestimate
you ought to underestimate
they ought to underestimate 	I ought to be underestimating
you ought to be underestimating
he ought to be underestimating
we ought to be underestimating
you ought to be underestimating
they ought to be underestimating	I ought to have underestimated
you ought to have underestimated
he ought to have underestimated
we ought to have underestimated
you ought to have underestimated
they ought to have underestimated	I ought to have been underestimating
you ought to have been underestimating
he ought to have been underestimating
we ought to have been underestimating
you ought to have been underestimating
they ought to have been underestimating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to underestimate
you ought not to underestimate
he ought not to underestimate
we ought not to underestimate
you ought not to underestimate
they ought not to underestimate 	I ought not to underestimating
you ought not to underestimating
he ought not to underestimating
we ought not to underestimating
you ought not to underestimating
they ought not to underestimating	I ought not to have underestimated
you ought not to have underestimated
he ought not to have underestimated
we ought not to have underestimated
you ought not to have underestimated
they ought not to have underestimated	I ought not to have been underestimating
you ought not to have been underestimating
he ought not to have been underestimating
we ought not to have been underestimating
you ought not to have been underestimating
they ought not to have been underestimating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I underestimate?
ought to you underestimate?
ought to he underestimate?
ought to we underestimate?
ought to you underestimate?
ought to they underestimate? 	ought to I be underestimating?
ought to you be underestimating?
ought to he be underestimating?
ought to we be underestimating?
ought to you be underestimating?
ought to they be underestimating? 	ought to I have underestimated?
ought to you have underestimated?
ought to he have underestimated?
ought to we have underestimated?
ought to you have underestimated?
ought to they have underestimated? 	ought to I have been underestimating?
ought to you have been underestimating?
ought to he have been underestimating?
ought to we have been underestimating?
ought to you have been underestimating?
ought to they have been underestimating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to underestimate?
ought you not to underestimate?
ought he not to underestimate?
ought we not to underestimate?
ought you not to underestimate?
ought they not to underestimate? 	ought I not to be underestimating?
ought you not to be underestimating?
ought he not to be underestimating?
ought we not to be underestimating?
ought you not to be underestimating?
ought they not to be underestimating? 	ought I not to have underestimated?
ought you not to have underestimated?
ought he not to have underestimated?
ought we not to have underestimated?
ought you not to have underestimated?
ought they not to have underestimated? 	ought I not to have been underestimating?
ought you not to have been underestimating?
ought he not to have been underestimating?
ought we not to have been underestimating?
ought you not to have been underestimating?
ought they not to have been underestimating?