Translation of verschlechtern

Great pictures. This looks very promising! At what time do you need to be back on Monday? I may have to return early on Tuesday as well, because my daughter's and my son's birthday are on the same date.
In plural there is no difference between the formal and the colloquial address form. Do you mean that you are using 3rd person singular form for the plural imperative? If so, I will change all entries so far.
Learning a new language is never easy, especially the first foreign language. Unfortunately, it's a bit difficult for me as well. But the vocabulary exercises here are really good.