English verb conjugation
CAN TREAD

Irregular verb: tread - trod - trod, trodden

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

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