I could hug you could hug he could hug we could hug you could hug they could hug
V-ing form
I could be hugging you could be hugging he could be hugging we could be hugging you could be hugging they could be hugging
Perfect
I could have hugged you could have hugged he could have hugged we could have hugged you could have hugged they could have hugged
V-ing perfect
I could have been hugging you could have been hugging he could have been hugging we could have been hugging you could have been hugging they could have been hugging
Negation
Simple form
I could not hug you could not hug he could not hug we could not hug you could not hug they could not hug
V-ing form
I could not be hugging you could not be hugging he could not be hugging we could not be hugging you could not be hugging they could not be hugging
Perfect
I could not have hugged you could not have hugged he could not have hugged we could not have hugged you could not have hugged they could not have hugged
V-ing perfect
I could not have been hugging you could not have been hugging he could not have been hugging we could not have been hugging you could not have been hugging they could not have been hugging
Interrogative form
Simple form
could I hug? could you hug? could he hug? could we hug? could you hug? could they hug?
V-ing form
could I be hugging? could you be hugging? could he be hugging? could we be hugging? could you be hugging? could they be hugging?
Perfect
could I have hugged? could you have hugged? could he have hugged? could we have hugged? could you have hugged? could they have hugged?
V-ing perfect
could I have been hugging? could you have been hugging? could he have been hugging? could we have been hugging? could you have been hugging? could they have been hugging?
Interro-negative form
Simple form
could I not hug? could you not hug? could he not hug? could we not hug? could you not hug? could they not hug?
V-ing form
could I not be hugging? could you not be hugging? could he not be hugging? could we not be hugging? could you not be hugging? could they not be hugging?
Perfect
could I not have hugged? could you not have hugged? could he not have hugged? could we not have hugged? could you not have hugged? could they not have hugged?
V-ing perfect
could I not have been hugging? could you not have been hugging? could he not have been hugging? could we not have been hugging? could you not have been hugging? could they not have been hugging?