English verb conjugation
COULD CORRADE

Regular verb: corrade - corraded - corraded

Affirmation

Simple form	V-ing form
I could corrade you could corrade he could corrade we could corrade you could corrade they could corrade	I could be corrading you could be corrading he could be corrading we could be corrading you could be corrading they could be corrading
Perfect	V-ing perfect
I could have corraded you could have corraded he could have corraded we could have corraded you could have corraded they could have corraded	I could have been corrading you could have been corrading he could have been corrading we could have been corrading you could have been corrading they could have been corrading

Negation

Simple form	V-ing form
I couldn't corrade you couldn't corrade he couldn't corrade we couldn't corrade you couldn't corrade they couldn't corrade	I couldn't be corrading you couldn't be corrading he couldn't be corrading we couldn't be corrading you couldn't be corrading they couldn't be corrading
Perfect	V-ing perfect
I couldn't have corraded you couldn't have corraded he couldn't have corraded we couldn't have corraded you couldn't have corraded they couldn't have corraded	I couldn't have been corrading you couldn't have been corrading he couldn't have been corrading we couldn't have been corrading you couldn't have been corrading they couldn't have been corrading

Interrogative form

Simple form	V-ing form
could I corrade? could you corrade? could he corrade? could we corrade? could you corrade? could they corrade?	could I be corrading? could you be corrading? could he be corrading? could we be corrading? could you be corrading? could they be corrading?
Perfect	V-ing perfect
could I have corraded? could you have corraded? could he have corraded? could we have corraded? could you have corraded? could they have corraded?	could I have been corrading? could you have been corrading? could he have been corrading? could we have been corrading? could you have been corrading? could they have been corrading?

Interro-negative form

Simple form	V-ing form
couldn't I corrade? couldn't you corrade? couldn't he corrade? couldn't we corrade? couldn't you corrade? couldn't they corrade?	couldn't I be corrading? couldn't you be corrading? couldn't he be corrading? couldn't we be corrading? couldn't you be corrading? couldn't they be corrading?
Perfect	V-ing perfect
couldn't I have corraded? couldn't you have corraded? couldn't he have corraded? couldn't we have corraded? couldn't you have corraded? couldn't they have corraded?	couldn't I have been corrading? couldn't you have been corrading? couldn't he have been corrading? couldn't we have been corrading? couldn't you have been corrading? couldn't they have been corrading?