English verb conjugation
COULD RETREAD

Regular verb: retread - retreaded - retreaded

Affirmation

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

Negation

Simple form	V-ing form
I could not retread you could not retread he could not retread we could not retread you could not retread they could not retread	I could not be retreading you could not be retreading he could not be retreading we could not be retreading you could not be retreading they could not be retreading
Perfect	V-ing perfect
I could not have retreaded you could not have retreaded he could not have retreaded we could not have retreaded you could not have retreaded they could not have retreaded	I could not have been retreading you could not have been retreading he could not have been retreading we could not have been retreading you could not have been retreading they could not have been retreading

Interrogative form

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

Interro-negative form

Simple form	V-ing form
could I not retread? could you not retread? could he not retread? could we not retread? could you not retread? could they not retread?	could I not be retreading? could you not be retreading? could he not be retreading? could we not be retreading? could you not be retreading? could they not be retreading?
Perfect	V-ing perfect
could I not have retreaded? could you not have retreaded? could he not have retreaded? could we not have retreaded? could you not have retreaded? could they not have retreaded?	could I not have been retreading? could you not have been retreading? could he not have been retreading? could we not have been retreading? could you not have been retreading? could they not have been retreading?