I may cross-fertilize you may cross-fertilize he may cross-fertilize we may cross-fertilize you may cross-fertilize they may cross-fertilize
V-ing form
I may be cross-fertilizing you may be cross-fertilizing he may be cross-fertilizing we may be cross-fertilizing you may be cross-fertilizing they may be cross-fertilizing
Perfect
I may have cross-fertilized you may have cross-fertilized he may have cross-fertilized we may have cross-fertilized you may have cross-fertilized they may have cross-fertilized
V-ing perfect
I may have been cross-fertilizing you may have been cross-fertilizing he may have been cross-fertilizing we may have been cross-fertilizing you may have been cross-fertilizing they may have been cross-fertilizing
Negation
Simple form
I mayn't cross-fertilize you mayn't cross-fertilize he mayn't cross-fertilize we mayn't cross-fertilize you mayn't cross-fertilize they mayn't cross-fertilize
V-ing form
I mayn't be cross-fertilizing you mayn't be cross-fertilizing he mayn't be cross-fertilizing we mayn't be cross-fertilizing you mayn't be cross-fertilizing they mayn't be cross-fertilizing
Perfect
I mayn't have cross-fertilized you mayn't have cross-fertilized he mayn't have cross-fertilized we mayn't have cross-fertilized you mayn't have cross-fertilized they mayn't have cross-fertilized
V-ing perfect
I mayn't have been cross-fertilizing you mayn't have been cross-fertilizing he mayn't have been cross-fertilizing we mayn't have been cross-fertilizing you mayn't have been cross-fertilizing they mayn't have been cross-fertilizing
Interrogative form
Simple form
may I cross-fertilize? may you cross-fertilize? may he cross-fertilize? may we cross-fertilize? may you cross-fertilize? may they cross-fertilize?
V-ing form
may I be cross-fertilizing? may you be cross-fertilizing? may he be cross-fertilizing? may we be cross-fertilizing? may you be cross-fertilizing? may they be cross-fertilizing?
Perfect
may I have cross-fertilized? may you have cross-fertilized? may he have cross-fertilized? may we have cross-fertilized? may you have cross-fertilized? may they have cross-fertilized?
V-ing perfect
may I have been cross-fertilizing? may you have been cross-fertilizing? may he have been cross-fertilizing? may we have been cross-fertilizing? may you have been cross-fertilizing? may they have been cross-fertilizing?
Interro-negative form
Simple form
mayn't I cross-fertilize? mayn't you cross-fertilize? mayn't he cross-fertilize? mayn't we cross-fertilize? mayn't you cross-fertilize? mayn't they cross-fertilize?
V-ing form
mayn't I be cross-fertilizing? mayn't you be cross-fertilizing? mayn't he be cross-fertilizing? mayn't we be cross-fertilizing? mayn't you be cross-fertilizing? mayn't they be cross-fertilizing?
Perfect
mayn't I have cross-fertilized? mayn't you have cross-fertilized? mayn't he have cross-fertilized? mayn't we have cross-fertilized? mayn't you have cross-fertilized? mayn't they have cross-fertilized?
V-ing perfect
mayn't I have been cross-fertilizing? mayn't you have been cross-fertilizing? mayn't he have been cross-fertilizing? mayn't we have been cross-fertilizing? mayn't you have been cross-fertilizing? mayn't they have been cross-fertilizing?