@Sumippi
Thanks for your help.
13. Oh you`re right, I forget made it negative. O_O
17. Ok, ;-) In this Lesson their just started with counting words, so there was just tsu. But thanks for saying, which counter word is the right.
18. Ah ok, I did just know 夕べ, but that could be any evening. ^^ Ok I will note that 昨夜 may be more used.
Danke, it helped me really. ^^ And I`m glad, you like German language.