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