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