I may obstruct you may obstruct he may obstruct we may obstruct you may obstruct they may obstruct
V-ing form
I may be obstructing you may be obstructing he may be obstructing we may be obstructing you may be obstructing they may be obstructing
Perfect
I may have obstructed you may have obstructed he may have obstructed we may have obstructed you may have obstructed they may have obstructed
V-ing perfect
I may have been obstructing you may have been obstructing he may have been obstructing we may have been obstructing you may have been obstructing they may have been obstructing
Negation
Simple form
I mayn't obstruct you mayn't obstruct he mayn't obstruct we mayn't obstruct you mayn't obstruct they mayn't obstruct
V-ing form
I mayn't be obstructing you mayn't be obstructing he mayn't be obstructing we mayn't be obstructing you mayn't be obstructing they mayn't be obstructing
Perfect
I mayn't have obstructed you mayn't have obstructed he mayn't have obstructed we mayn't have obstructed you mayn't have obstructed they mayn't have obstructed
V-ing perfect
I mayn't have been obstructing you mayn't have been obstructing he mayn't have been obstructing we mayn't have been obstructing you mayn't have been obstructing they mayn't have been obstructing
Interrogative form
Simple form
may I obstruct? may you obstruct? may he obstruct? may we obstruct? may you obstruct? may they obstruct?
V-ing form
may I be obstructing? may you be obstructing? may he be obstructing? may we be obstructing? may you be obstructing? may they be obstructing?
Perfect
may I have obstructed? may you have obstructed? may he have obstructed? may we have obstructed? may you have obstructed? may they have obstructed?
V-ing perfect
may I have been obstructing? may you have been obstructing? may he have been obstructing? may we have been obstructing? may you have been obstructing? may they have been obstructing?
Interro-negative form
Simple form
mayn't I obstruct? mayn't you obstruct? mayn't he obstruct? mayn't we obstruct? mayn't you obstruct? mayn't they obstruct?
V-ing form
mayn't I be obstructing? mayn't you be obstructing? mayn't he be obstructing? mayn't we be obstructing? mayn't you be obstructing? mayn't they be obstructing?
Perfect
mayn't I have obstructed? mayn't you have obstructed? mayn't he have obstructed? mayn't we have obstructed? mayn't you have obstructed? mayn't they have obstructed?
V-ing perfect
mayn't I have been obstructing? mayn't you have been obstructing? mayn't he have been obstructing? mayn't we have been obstructing? mayn't you have been obstructing? mayn't they have been obstructing?