Questions & Answers about Estamos muy nerviosos hoy.
Why do we use estamos here instead of somos?
Where is the word for "we" in this sentence?
The word for "we" (nosotros) is hidden in the verb! In Spanish, you can usually drop subject pronouns because the verb ending tells you who is doing the action. Estamos can only mean "we are", so adding nosotros at the beginning is optional.
Why does nerviosos end in -os?
Adjectives in Spanish must match the people they describe. Since "we" is more than one person, the adjective needs to be plural, which is why it ends in -s. The -o before the -s means this is a masculine (or mixed-gender) group. If it were a group of only women speaking, they would say Estamos muy nerviosas.