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