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