I may tread you may tread he may tread we may tread you may tread they may tread
V-ing form
I may be treading you may be treading he may be treading we may be treading you may be treading they may be treading
Perfect
I may have trod, trodden you may have trod, trodden he may have trod, trodden we may have trod, trodden you may have trod, trodden they may have trod, trodden
V-ing perfect
I may have been treading you may have been treading he may have been treading we may have been treading you may have been treading they may have been treading
Negation
Simple form
I may not tread you may not tread he may not tread we may not tread you may not tread they may not tread
V-ing form
I may not be treading you may not be treading he may not be treading we may not be treading you may not be treading they may not be treading
Perfect
I may not have trod, trodden you may not have trod, trodden he may not have trod, trodden we may not have trod, trodden you may not have trod, trodden they may not have trod, trodden
V-ing perfect
I may not have been treading you may not have been treading he may not have been treading we may not have been treading you may not have been treading they may not have been treading
Interrogative form
Simple form
may I tread? may you tread? may he tread? may we tread? may you tread? may they tread?
V-ing form
may I be treading? may you be treading? may he be treading? may we be treading? may you be treading? may they be treading?
Perfect
may I have trod, trodden? may you have trod, trodden? may he have trod, trodden? may we have trod, trodden? may you have trod, trodden? may they have trod, trodden?
V-ing perfect
may I have been treading? may you have been treading? may he have been treading? may we have been treading? may you have been treading? may they have been treading?
Interro-negative form
Simple form
may I not tread? may you not tread? may he not tread? may we not tread? may you not tread? may they not tread?
V-ing form
may I not be treading? may you not be treading? may he not be treading? may we not be treading? may you not be treading? may they not be treading?
Perfect
may I not have trod, trodden? may you not have trod, trodden? may he not have trod, trodden? may we not have trod, trodden? may you not have trod, trodden? may they not have trod, trodden?
V-ing perfect
may I not have been treading? may you not have been treading? may he not have been treading? may we not have been treading? may you not have been treading? may they not have been treading?