Translation of cowardice in German

I bought the ticket very quickly and ran to the gate. A stewardess was waiting for me and waved. She shouted that I should hurry up. I ran as fast as I could and entered the gate leading to the plane.
Yes, but I was unable to work on this yesterday, and today will be almost impossible too. Between tomorrow and Sunday you'll have quite a few more entries in the system. I just wanted to know how it is going.
I am in my German lesson and I'm learning about the subjunctive. I had never heard about it before. Can you ever deal with all Verb conjugations? I just totally misunderstand the past tense!