should obstruct
Regular verb: obstruct - obstructed- obstructed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd obstruct
you'd obstruct
she'd obstruct
we'd obstruct
you'd obstruct
they'd obstruct 	I'd be obstructing
you'd be obstructing
she'd be obstructing
we'd be obstructing
you'd be obstructing
they'd be obstructing	I should've obstructed
you should've obstructed
she should've obstructed
we should've obstructed
you should've obstructed
they should've obstructed	I should've been obstructing
you should've been obstructing
she should've been obstructing
we should've been obstructing
you should've been obstructing
they should've been obstructing	

Negation 	
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I shouldn't obstruct
you shouldn't obstruct
she shouldn't obstruct
we shouldn't obstruct
you shouldn't obstruct
they shouldn't obstruct 	I shouldn't be obstructing
you shouldn't be obstructing
she shouldn't be obstructing
we shouldn't be obstructing
you shouldn't be obstructing
they shouldn't be obstructing	I shouldn't have obstructed
you shouldn't have obstructed
she shouldn't have obstructed
we shouldn't have obstructed
you shouldn't have obstructed
they shouldn't have obstructed	I shouldn't have been obstructing
you shouldn't have been obstructing
she shouldn't have been obstructing
we shouldn't have been obstructing
you shouldn't have been obstructing
they shouldn't have been obstructing	

Interrogative form 	
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should I obstruct?
should you obstruct?
should she obstruct?
should we obstruct?
should you obstruct?
should they obstruct? 	should I be obstructing?
should you be obstructing?
should she be obstructing?
should we be obstructing?
should you be obstructing?
should they be obstructing? 	should I have obstructed?
should you have obstructed?
should she have obstructed?
should we have obstructed?
should you have obstructed?
should they have obstructed? 	should I have been obstructing?
should you have been obstructing?
should she have been obstructing?
should we have been obstructing?
should you have been obstructing?
should they have been obstructing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I obstruct?
shouldn't you obstruct?
shouldn't she obstruct?
shouldn't we obstruct?
shouldn't you obstruct?
shouldn't they obstruct? 	shouldn't I be obstructing?
shouldn't you be obstructing?
shouldn't she be obstructing?
shouldn't we be obstructing?
shouldn't you be obstructing?
shouldn't they be obstructing? 	shouldn't I have obstructed?
shouldn't you have obstructed?
shouldn't she have obstructed?
shouldn't we have obstructed?
shouldn't you have obstructed?
shouldn't they have obstructed? 	shouldn't I have been obstructing?
shouldn't you have been obstructing?
shouldn't she have been obstructing?
shouldn't we have been obstructing?
shouldn't you have been obstructing?
shouldn't they have been obstructing?