English verb conjugation
CAN RETREAD

Regular verb: retread - retreaded - retreaded

Affirmation

Simple form	V-ing form
I can retread you can retread he can retread we can retread you can retread they can retread	I can be retreading you can be retreading he can be retreading we can be retreading you can be retreading they can be retreading
Perfect	V-ing perfect
I can have retreaded you can have retreaded he can have retreaded we can have retreaded you can have retreaded they can have retreaded	I can have been retreading you can have been retreading he can have been retreading we can have been retreading you can have been retreading they can have been retreading

Negation

Simple form	V-ing form
I can't retread you can't retread he can't retread we can't retread you can't retread they can't retread	I can't be retreading you can't be retreading he can't be retreading we can't be retreading you can't be retreading they can't be retreading
Perfect	V-ing perfect
I can't have retreaded you can't have retreaded he can't have retreaded we can't have retreaded you can't have retreaded they can't have retreaded	I can't have been retreading you can't have been retreading he can't have been retreading we can't have been retreading you can't have been retreading they can't have been retreading

Interrogative form

Simple form	V-ing form
can I retread? can you retread? can he retread? can we retread? can you retread? can they retread?	can I be retreading? can you be retreading? can he be retreading? can we be retreading? can you be retreading? can they be retreading?
Perfect	V-ing perfect
can I have retreaded? can you have retreaded? can he have retreaded? can we have retreaded? can you have retreaded? can they have retreaded?	can I have been retreading? can you have been retreading? can he have been retreading? can we have been retreading? can you have been retreading? can they have been retreading?

Interro-negative form

Simple form	V-ing form
can't I retread? can't you retread? can't he retread? can't we retread? can't you retread? can't they retread?	can't I be retreading? can't you be retreading? can't he be retreading? can't we be retreading? can't you be retreading? can't they be retreading?
Perfect	V-ing perfect
can't I have retreaded? can't you have retreaded? can't he have retreaded? can't we have retreaded? can't you have retreaded? can't they have retreaded?	can't I have been retreading? can't you have been retreading? can't he have been retreading? can't we have been retreading? can't you have been retreading? can't they have been retreading?