1. They often negotiate with foreign companies.
2. They are negotiating now.
3. They negotiated with this company last week.
4. They have been negotiating with the "Black & K" Company this
week.
5. When we came back to the office, they were still negotiating.
6. We are going to negotiate with them next week.
7. Our office usually dispatches equipment on time.
8. Our office has not dispatched the equipment yet.