Questions & Answers about Президент уже здесь.
In Russian, the verb to be is usually omitted in the present tense.
So:
- Президент уже здесь. = The president is already here.
Russian does not normally say a present-tense equivalent of Президент уже есть здесь for this meaning. That would sound unnatural.
You will often see this pattern:
- Он дома. = He is at home.
- Мама на работе. = Mom is at work.
- Президент здесь. = The president is here.
In past or future tense, forms of быть do appear:
- Президент был здесь. = The president was here.
- Президент будет здесь. = The president will be here.
Президент is in the nominative case.
It is the subject of the sentence: the person being talked about.
Here the sentence structure is basically:
- Президент = subject
- уже = already
- здесь = here
Since nothing is happening to the president grammatically, and he is simply the topic/subject, the nominative is used.