English verb conjugation
CAN OBSTRUCT

Regular verb: obstruct - obstructed - obstructed

Affirmation

Simple form	V-ing form
I can obstruct you can obstruct he can obstruct we can obstruct you can obstruct they can obstruct	I can be obstructing you can be obstructing he can be obstructing we can be obstructing you can be obstructing they can be obstructing
Perfect	V-ing perfect
I can have obstructed you can have obstructed he can have obstructed we can have obstructed you can have obstructed they can have obstructed	I can have been obstructing you can have been obstructing he can have been obstructing we can have been obstructing you can have been obstructing they can have been obstructing

Negation

Simple form	V-ing form
I can't obstruct you can't obstruct he can't obstruct we can't obstruct you can't obstruct they can't obstruct	I can't be obstructing you can't be obstructing he can't be obstructing we can't be obstructing you can't be obstructing they can't be obstructing
Perfect	V-ing perfect
I can't have obstructed you can't have obstructed he can't have obstructed we can't have obstructed you can't have obstructed they can't have obstructed	I can't have been obstructing you can't have been obstructing he can't have been obstructing we can't have been obstructing you can't have been obstructing they can't have been obstructing

Interrogative form

Simple form	V-ing form
can I obstruct? can you obstruct? can he obstruct? can we obstruct? can you obstruct? can they obstruct?	can I be obstructing? can you be obstructing? can he be obstructing? can we be obstructing? can you be obstructing? can they be obstructing?
Perfect	V-ing perfect
can I have obstructed? can you have obstructed? can he have obstructed? can we have obstructed? can you have obstructed? can they have obstructed?	can I have been obstructing? can you have been obstructing? can he have been obstructing? can we have been obstructing? can you have been obstructing? can they have been obstructing?

Interro-negative form

Simple form	V-ing form
can't I obstruct? can't you obstruct? can't he obstruct? can't we obstruct? can't you obstruct? can't they obstruct?	can't I be obstructing? can't you be obstructing? can't he be obstructing? can't we be obstructing? can't you be obstructing? can't they be obstructing?
Perfect	V-ing perfect
can't I have obstructed? can't you have obstructed? can't he have obstructed? can't we have obstructed? can't you have obstructed? can't they have obstructed?	can't I have been obstructing? can't you have been obstructing? can't he have been obstructing? can't we have been obstructing? can't you have been obstructing? can't they have been obstructing?