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