Verb conjugation of "befördern" in German

Yesterday, I heard a very good example to explain my point: On their journey more than ten years ago, the presidential couple Mr. and Mrs. Clinton visited Egypt. They were welcomed by the president.
Anyway, once we arrived at the guest house the rules were explained: Washing my Jeans would be 2 dollars, a pair of socks 1 dollar and so on. I did not feel comfortable with these people.
We added all tenses to the online conjugator. Please have a look. Please tell me if you like it, whether it is useful to you and whether you would integrate it into your homepage for language studies.