Answer:
le week-end, nous sommes manger au parc.
Step-by-step explanation:
the congugations for the verb être: to be
je suis. = I am
tu es. = you are ( informal for friends or close adults)
il/Elle est = he/she is
nous sommes = we are
vous êtes = you are (formal)
ils/elles sont = he's/she's or they are (for a mixed group.)