Verb conjugation of "plunge" in English

I ran across the bridge to reach the other terminal and asked at the check in counter which connecting flights were still available. I wanted to avoid having to drive into the city at any cost.
I would gladly be your friend, but I must admit that I have little time for learning because of my work. Maybe we can talk now and see how it goes. If it goes well I can return home earlier.
I teach at the university of natural sciences. I have studied at the ETH in Zurich. At that time I started learning Spanish and I found Vocabulix. Since then I'm using it regularly with joy.