shall obstruct
Regular verb: obstruct - obstructed- obstructed

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

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shan't obstruct
you shan't obstruct
she shan't obstruct
we shan't obstruct
you shan't obstruct
they shan't obstruct 	I shan't be obstructing
you shan't be obstructing
she shan't be obstructing
we shan't be obstructing
you shan't be obstructing
they shan't be obstructing	I shan't have obstructed
you shan't have obstructed
she shan't have obstructed
we shan't have obstructed
you shan't have obstructed
they shan't have obstructed	I shan't have been obstructing
you shan't have been obstructing
she shan't have been obstructing
we shan't have been obstructing
you shan't have been obstructing
they shan't have been obstructing	

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

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