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 may not observe you may not observe he may not observe we may not observe you may not observe they may not observe
V-ing form
I may not be observing you may not be observing he may not be observing we may not be observing you may not be observing they may not be observing
Perfect
I may not have observed you may not have observed he may not have observed we may not have observed you may not have observed they may not have observed
V-ing perfect
I may not have been observing you may not have been observing he may not have been observing we may not have been observing you may not have been observing they may not 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
may I not observe? may you not observe? may he not observe? may we not observe? may you not observe? may they not observe?
V-ing form
may I not be observing? may you not be observing? may he not be observing? may we not be observing? may you not be observing? may they not be observing?
Perfect
may I not have observed? may you not have observed? may he not have observed? may we not have observed? may you not have observed? may they not have observed?
V-ing perfect
may I not have been observing? may you not have been observing? may he not have been observing? may we not have been observing? may you not have been observing? may they not have been observing?