Questions & Answers about Το σύμπαν είναι τεράστιο.
Το is the definite article, meaning the. In this sentence, το σύμπαν means the universe.
A useful thing to know is that Greek articles change for gender, number, and case. Here, το is the neuter singular nominative form.
Σύμπαν is a neuter noun. Greek nouns have grammatical gender, and σύμπαν happens to be neuter.
That matters because words connected to it, like the article and adjective, must match it:
- το = neuter singular
- τεράστιο = neuter singular
So the whole sentence agrees grammatically.
Είναι is the present-tense form of the verb είμαι, meaning to be.
In this sentence, it means is:
- Το σύμπαν είναι τεράστιο = The universe is enormous
A helpful note: in Modern Greek, είναι is used for both he/she/it is and they are, so context tells you which one is meant.