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