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