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