Mark (no está corriendo) in the park.
I (no estoy usando) a jacket today.
The mechanics (no están reparando) the engine.
She (no está escribiendo) an email to her boss.
You and I (no vamos) to the party tonight.
The sun (no brilla) brightly this morning.
We (no estamos viajando) to London next week.
The cat (no está atrapando) the mouse.
They (no están construyendo) a new house in our street.
Oliver (no está usando) the computer right now.