Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could redate you could redate he could redate we could redate you could redate they could redate
V-ing form
I could be redating you could be redating he could be redating we could be redating you could be redating they could be redating
Perfect
I could have redated you could have redated he could have redated we could have redated you could have redated they could have redated
V-ing perfect
I could have been redating you could have been redating he could have been redating we could have been redating you could have been redating they could have been redating
Negation
Simple form
I couldn't redate you couldn't redate he couldn't redate we couldn't redate you couldn't redate they couldn't redate
V-ing form
I couldn't be redating you couldn't be redating he couldn't be redating we couldn't be redating you couldn't be redating they couldn't be redating
Perfect
I couldn't have redated you couldn't have redated he couldn't have redated we couldn't have redated you couldn't have redated they couldn't have redated
V-ing perfect
I couldn't have been redating you couldn't have been redating he couldn't have been redating we couldn't have been redating you couldn't have been redating they couldn't have been redating
Interrogative form
Simple form
could I redate? could you redate? could he redate? could we redate? could you redate? could they redate?
V-ing form
could I be redating? could you be redating? could he be redating? could we be redating? could you be redating? could they be redating?
Perfect
could I have redated? could you have redated? could he have redated? could we have redated? could you have redated? could they have redated?
V-ing perfect
could I have been redating? could you have been redating? could he have been redating? could we have been redating? could you have been redating? could they have been redating?
Interro-negative form
Simple form
couldn't I redate? couldn't you redate? couldn't he redate? couldn't we redate? couldn't you redate? couldn't they redate?
V-ing form
couldn't I be redating? couldn't you be redating? couldn't he be redating? couldn't we be redating? couldn't you be redating? couldn't they be redating?
Perfect
couldn't I have redated? couldn't you have redated? couldn't he have redated? couldn't we have redated? couldn't you have redated? couldn't they have redated?
V-ing perfect
couldn't I have been redating? couldn't you have been redating? couldn't he have been redating? couldn't we have been redating? couldn't you have been redating? couldn't they have been redating?