ought to obstruct
Regular verb: obstruct - obstructed- obstructed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought to obstruct
you ought to obstruct
she ought to obstruct
we ought to obstruct
you ought to obstruct
they ought to obstruct 	I ought to be obstructing
you ought to be obstructing
she ought to be obstructing
we ought to be obstructing
you ought to be obstructing
they ought to be obstructing	I ought to have obstructed
you ought to have obstructed
she ought to have obstructed
we ought to have obstructed
you ought to have obstructed
they ought to have obstructed	I ought to have been obstructing
you ought to have been obstructing
she ought to have been obstructing
we ought to have been obstructing
you ought to have been obstructing
they ought to have been obstructing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I ought not to obstruct
you ought not to obstruct
she ought not to obstruct
we ought not to obstruct
you ought not to obstruct
they ought not to obstruct 	I ought not to obstructing
you ought not to obstructing
she ought not to obstructing
we ought not to obstructing
you ought not to obstructing
they ought not to obstructing	I ought not to have obstructed
you ought not to have obstructed
she ought not to have obstructed
we ought not to have obstructed
you ought not to have obstructed
they ought not to have obstructed	I ought not to have been obstructing
you ought not to have been obstructing
she ought not to have been obstructing
we ought not to have been obstructing
you ought not to have been obstructing
they ought not to have been obstructing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought to I obstruct?
ought to you obstruct?
ought to she obstruct?
ought to we obstruct?
ought to you obstruct?
ought to they obstruct? 	ought to I be obstructing?
ought to you be obstructing?
ought to she be obstructing?
ought to we be obstructing?
ought to you be obstructing?
ought to they be obstructing? 	ought to I have obstructed?
ought to you have obstructed?
ought to she have obstructed?
ought to we have obstructed?
ought to you have obstructed?
ought to they have obstructed? 	ought to I have been obstructing?
ought to you have been obstructing?
ought to she have been obstructing?
ought to we have been obstructing?
ought to you have been obstructing?
ought to they have been obstructing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
ought I not to obstruct?
ought you not to obstruct?
ought she not to obstruct?
ought we not to obstruct?
ought you not to obstruct?
ought they not to obstruct? 	ought I not to be obstructing?
ought you not to be obstructing?
ought she not to be obstructing?
ought we not to be obstructing?
ought you not to be obstructing?
ought they not to be obstructing? 	ought I not to have obstructed?
ought you not to have obstructed?
ought she not to have obstructed?
ought we not to have obstructed?
ought you not to have obstructed?
ought they not to have obstructed? 	ought I not to have been obstructing?
ought you not to have been obstructing?
ought she not to have been obstructing?
ought we not to have been obstructing?
ought you not to have been obstructing?
ought they not to have been obstructing?