English verb conjugation
CAN TREAD

Irregular verb: tread - trod - trod, trodden

Affirmation

Simple form	V-ing form
I can tread you can tread she can tread we can tread you can tread they can tread	I can be treading you can be treading she 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 she 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 she 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 she cannot tread we cannot tread you cannot tread they cannot tread	I cannot be treading you cannot be treading she 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 she 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 she 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 she tread? can we tread? can you tread? can they tread?	can I be treading? can you be treading? can she 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 she 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 she 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 she 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 she 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 she 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 she not have been treading? can we not have been treading? can you not have been treading? can they not have been treading?