English verb conjugation
COULD RETREAD

Regular verb: retread - retreaded - retreaded

Affirmation

Simple form	V-ing form
I could retread you could retread she could retread we could retread you could retread they could retread	I could be retreading you could be retreading she 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 she 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 she 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 couldn't retread you couldn't retread she couldn't retread we couldn't retread you couldn't retread they couldn't retread	I couldn't be retreading you couldn't be retreading she couldn't be retreading we couldn't be retreading you couldn't be retreading they couldn't be retreading
Perfect	V-ing perfect
I couldn't have retreaded you couldn't have retreaded she couldn't have retreaded we couldn't have retreaded you couldn't have retreaded they couldn't have retreaded	I couldn't have been retreading you couldn't have been retreading she couldn't have been retreading we couldn't have been retreading you couldn't have been retreading they couldn't have been retreading

Interrogative form

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