I can welcome you can welcome he can welcome we can welcome you can welcome they can welcome
V-ing form
I can be welcoming you can be welcoming he can be welcoming we can be welcoming you can be welcoming they can be welcoming
Perfect
I can have welcomed you can have welcomed he 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 he 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 he 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 he 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 he 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 he 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 he welcome? can we welcome? can you welcome? can they welcome?
V-ing form
can I be welcoming? can you be welcoming? can he be welcoming? can we be welcoming? can you be welcoming? can they be welcoming?
Perfect
can I have welcomed? can you have welcomed? can he 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 he 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 he 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 he 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 he 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 he have been welcoming? can't we have been welcoming? can't you have been welcoming? can't they have been welcoming?