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