English verb conjugation
SHOULD TREAD

Irregular verb: tread - trod - trod, trodden

Affirmation

Simple form	V-ing form
I should tread you should tread he should tread we should tread you should tread they should tread	I should be treading you should be treading he should be treading we should be treading you should be treading they should be treading
Perfect	V-ing perfect
I should have trod, trodden you should have trod, trodden he should have trod, trodden we should have trod, trodden you should have trod, trodden they should have trod, trodden	I should have been treading you should have been treading he should have been treading we should have been treading you should have been treading they should have been treading

Negation

Simple form	V-ing form
I should not tread you should not tread he should not tread we should not tread you should not tread they should not tread	I should not be treading you should not be treading he should not be treading we should not be treading you should not be treading they should not be treading
Perfect	V-ing perfect
I should not have trod, trodden you should not have trod, trodden he should not have trod, trodden we should not have trod, trodden you should not have trod, trodden they should not have trod, trodden	I should not have been treading you should not have been treading he should not have been treading we should not have been treading you should not have been treading they should not have been treading

Interrogative form

Simple form	V-ing form
should I tread? should you tread? should he tread? should we tread? should you tread? should they tread?	should I be treading? should you be treading? should he be treading? should we be treading? should you be treading? should they be treading?
Perfect	V-ing perfect
should I have trod, trodden? should you have trod, trodden? should he have trod, trodden? should we have trod, trodden? should you have trod, trodden? should they have trod, trodden?	should I have been treading? should you have been treading? should he have been treading? should we have been treading? should you have been treading? should they have been treading?

Interro-negative form

Simple form	V-ing form
should I not tread? should you not tread? should he not tread? should we not tread? should you not tread? should they not tread?	should I not be treading? should you not be treading? should he not be treading? should we not be treading? should you not be treading? should they not be treading?
Perfect	V-ing perfect
should I not have trod, trodden? should you not have trod, trodden? should he not have trod, trodden? should we not have trod, trodden? should you not have trod, trodden? should they not have trod, trodden?	should I not have been treading? should you not have been treading? should he not have been treading? should we not have been treading? should you not have been treading? should they not have been treading?