I can welcome you can welcome she can welcome we can welcome you can welcome they can welcome
V-ing form
I can be welcoming you can be welcoming she can be welcoming we can be welcoming you can be welcoming they can be welcoming
Perfect
I can have welcomed you can have welcomed she can have welcomed we can have welcomed you can have welcomed they can have welcomed
V-ing perfect
I can have been welcoming you can have been welcoming she can have been welcoming we can have been welcoming you can have been welcoming they can have been welcoming
Negation
Simple form
I can't welcome you can't welcome she can't welcome we can't welcome you can't welcome they can't welcome
V-ing form
I can't be welcoming you can't be welcoming she can't be welcoming we can't be welcoming you can't be welcoming they can't be welcoming
Perfect
I can't have welcomed you can't have welcomed she can't have welcomed we can't have welcomed you can't have welcomed they can't have welcomed
V-ing perfect
I can't have been welcoming you can't have been welcoming she can't have been welcoming we can't have been welcoming you can't have been welcoming they can't have been welcoming
Interrogative form
Simple form
can I welcome? can you welcome? can she welcome? can we welcome? can you welcome? can they welcome?
V-ing form
can I be welcoming? can you be welcoming? can she be welcoming? can we be welcoming? can you be welcoming? can they be welcoming?
Perfect
can I have welcomed? can you have welcomed? can she have welcomed? can we have welcomed? can you have welcomed? can they have welcomed?
V-ing perfect
can I have been welcoming? can you have been welcoming? can she have been welcoming? can we have been welcoming? can you have been welcoming? can they have been welcoming?
Interro-negative form
Simple form
can't I welcome? can't you welcome? can't she welcome? can't we welcome? can't you welcome? can't they welcome?
V-ing form
can't I be welcoming? can't you be welcoming? can't she be welcoming? can't we be welcoming? can't you be welcoming? can't they be welcoming?
Perfect
can't I have welcomed? can't you have welcomed? can't she have welcomed? can't we have welcomed? can't you have welcomed? can't they have welcomed?
V-ing perfect
can't I have been welcoming? can't you have been welcoming? can't she have been welcoming? can't we have been welcoming? can't you have been welcoming? can't they have been welcoming?