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 can't hug you can't hug he can't hug we can't hug you can't hug they can't hug
V-ing form
I can't be hugging you can't be hugging he can't be hugging we can't be hugging you can't be hugging they can't be hugging
Perfect
I can't have hugged you can't have hugged he can't have hugged we can't have hugged you can't have hugged they can't have hugged
V-ing perfect
I can't have been hugging you can't have been hugging he can't have been hugging we can't have been hugging you can't have been hugging they can't 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't I hug? can't you hug? can't he hug? can't we hug? can't you hug? can't they hug?
V-ing form
can't I be hugging? can't you be hugging? can't he be hugging? can't we be hugging? can't you be hugging? can't they be hugging?
Perfect
can't I have hugged? can't you have hugged? can't he have hugged? can't we have hugged? can't you have hugged? can't they have hugged?
V-ing perfect
can't I have been hugging? can't you have been hugging? can't he have been hugging? can't we have been hugging? can't you have been hugging? can't they have been hugging?