Translation of vierfach

There were two options, a connection flight to Phuket and one to Krabi. Generally, I wanted to reach the western part of the country, because it apparently had better weather this time of year.
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.
What are you doing? I'm at work. It is so boring and my boss is not here. Yesterday I was here until midnight, because we had problems with the PC system. Then we ordered pizza and a few beers.