may obstruct
Regular verb: obstruct - obstructed- obstructed

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

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

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

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