Questions & Answers about ¿Tienes alguna duda sobre el informe?
Because tienes is the tú form of the verb tener in the present tense.
So ¿Tienes alguna duda sobre el informe? is addressed to one person informally.
If you were speaking formally, you would say:
- ¿Tiene alguna duda sobre el informe?
In Spanish, subject pronouns are often omitted because the verb ending already shows who the subject is.
- tienes already tells you the subject is tú
So:
and
- ¿Tú tienes alguna duda sobre el informe?
both mean the same thing, but the version without tú is more natural in most situations.
You might include tú for emphasis, contrast, or clarity.