English verb conjugation
COULD HALLOO

Regular verb: halloo - hallooed - hallooed

Affirmation

Simple form	V-ing form
I could halloo you could halloo he could halloo we could halloo you could halloo they could halloo	I could be hallooing you could be hallooing he could be hallooing we could be hallooing you could be hallooing they could be hallooing
Perfect	V-ing perfect
I could have hallooed you could have hallooed he could have hallooed we could have hallooed you could have hallooed they could have hallooed	I could have been hallooing you could have been hallooing he could have been hallooing we could have been hallooing you could have been hallooing they could have been hallooing

Negation

Simple form	V-ing form
I could not halloo you could not halloo he could not halloo we could not halloo you could not halloo they could not halloo	I could not be hallooing you could not be hallooing he could not be hallooing we could not be hallooing you could not be hallooing they could not be hallooing
Perfect	V-ing perfect
I could not have hallooed you could not have hallooed he could not have hallooed we could not have hallooed you could not have hallooed they could not have hallooed	I could not have been hallooing you could not have been hallooing he could not have been hallooing we could not have been hallooing you could not have been hallooing they could not have been hallooing

Interrogative form

Simple form	V-ing form
could I halloo? could you halloo? could he halloo? could we halloo? could you halloo? could they halloo?	could I be hallooing? could you be hallooing? could he be hallooing? could we be hallooing? could you be hallooing? could they be hallooing?
Perfect	V-ing perfect
could I have hallooed? could you have hallooed? could he have hallooed? could we have hallooed? could you have hallooed? could they have hallooed?	could I have been hallooing? could you have been hallooing? could he have been hallooing? could we have been hallooing? could you have been hallooing? could they have been hallooing?

Interro-negative form

Simple form	V-ing form
could I not halloo? could you not halloo? could he not halloo? could we not halloo? could you not halloo? could they not halloo?	could I not be hallooing? could you not be hallooing? could he not be hallooing? could we not be hallooing? could you not be hallooing? could they not be hallooing?
Perfect	V-ing perfect
could I not have hallooed? could you not have hallooed? could he not have hallooed? could we not have hallooed? could you not have hallooed? could they not have hallooed?	could I not have been hallooing? could you not have been hallooing? could he not have been hallooing? could we not have been hallooing? could you not have been hallooing? could they not have been hallooing?