[Grammar] had or have

[Disillusia]

"Also, we would like to thank you most sincerely for all the kind assistance as well as the customers you have brought to us during the course of our partnership."

Is this grammatical? Should I use had or have? And what's the reason?

 

[5jj]

If the partnership has ended, then it's just 'brought' - the bringing was in the past. If the partnership has continued to the moment of speaking, then it's '[STRIKE]has[/STRIKE] have brought'.

 

[emsr2d2]

If the partnership has ended, then it's just 'brought' - the bringing was in the past. If the partnership has continued to the moment of speaking, then it's 'has brought'.

"... all the customers you has brought ...", 5jj? Are you sure? ;-)

 

[5jj]

"... all the customers you has brought ...", 5jj? Are you sure? ;-)