English verb conjugation
COULD ANTIQUATE

Regular verb: antiquate - antiquated - antiquated

Affirmation

Simple form	V-ing form
I could antiquate you could antiquate he could antiquate we could antiquate you could antiquate they could antiquate	I could be antiquating you could be antiquating he could be antiquating we could be antiquating you could be antiquating they could be antiquating
Perfect	V-ing perfect
I could have antiquated you could have antiquated he could have antiquated we could have antiquated you could have antiquated they could have antiquated	I could have been antiquating you could have been antiquating he could have been antiquating we could have been antiquating you could have been antiquating they could have been antiquating

Negation

Simple form	V-ing form
I couldn't antiquate you couldn't antiquate he couldn't antiquate we couldn't antiquate you couldn't antiquate they couldn't antiquate	I couldn't be antiquating you couldn't be antiquating he couldn't be antiquating we couldn't be antiquating you couldn't be antiquating they couldn't be antiquating
Perfect	V-ing perfect
I couldn't have antiquated you couldn't have antiquated he couldn't have antiquated we couldn't have antiquated you couldn't have antiquated they couldn't have antiquated	I couldn't have been antiquating you couldn't have been antiquating he couldn't have been antiquating we couldn't have been antiquating you couldn't have been antiquating they couldn't have been antiquating

Interrogative form

Simple form	V-ing form
could I antiquate? could you antiquate? could he antiquate? could we antiquate? could you antiquate? could they antiquate?	could I be antiquating? could you be antiquating? could he be antiquating? could we be antiquating? could you be antiquating? could they be antiquating?
Perfect	V-ing perfect
could I have antiquated? could you have antiquated? could he have antiquated? could we have antiquated? could you have antiquated? could they have antiquated?	could I have been antiquating? could you have been antiquating? could he have been antiquating? could we have been antiquating? could you have been antiquating? could they have been antiquating?

Interro-negative form

Simple form	V-ing form
couldn't I antiquate? couldn't you antiquate? couldn't he antiquate? couldn't we antiquate? couldn't you antiquate? couldn't they antiquate?	couldn't I be antiquating? couldn't you be antiquating? couldn't he be antiquating? couldn't we be antiquating? couldn't you be antiquating? couldn't they be antiquating?
Perfect	V-ing perfect
couldn't I have antiquated? couldn't you have antiquated? couldn't he have antiquated? couldn't we have antiquated? couldn't you have antiquated? couldn't they have antiquated?	couldn't I have been antiquating? couldn't you have been antiquating? couldn't he have been antiquating? couldn't we have been antiquating? couldn't you have been antiquating? couldn't they have been antiquating?