long-term

[Hanka]

Hello,

could you please tell me which tense should I use in the following sentece:

We maintain (or have maintained) a long-term business relation - more than one year.

Thank you very much.

Hanka

[DavyBCN]

Hello,
could you please tell me which tense should I use in the following sentece:
We maintain (or have maintained) a long-term business relation - more than one year.
Thank you very much.
Hanka

Have maintained - started in the past and is still efective now. A good use of the present perfect tense.