Resto in casa tutta la mattina.

I stay at home all morning.

Breakdown of Resto in casa tutta la mattina.

• io: I
• la mattina: the morning
• in: in
• la casa: the house

Questions & Answers about Resto in casa tutta la mattina.

What does resto mean here, and what verb does it come from?

Resto is the first-person singular present form of restare.

• restare = to stay, to remain
• resto = I stay / I remain

So in this sentence, resto means I stay.

It follows the regular -are pattern in the present tense:

• io resto
• tu resti
• lui/lei resta
• noi restiamo
• voi restate
• loro restano

Why is there no io in the sentence?

Italian often leaves out the subject pronoun when it is already clear from the verb ending.

Here, resto already tells you the subject is I, because the -o ending marks first person singular.

So:

• Resto in casa tutta la mattina.
• Io resto in casa tutta la mattina.

Both are correct, but the version without io is more natural unless you want emphasis, contrast, or clarity.

For example:

• Io resto in casa, tu esci.
  = I stay at home, you go out.

Why does Italian use resto here instead of sono?