1. I am sick. Estoy enfermo/a. 2. I was sick yesterday. Estuve enfermo/a ayer. 3. I have been sick for two days. He estado enfermo/a por dos días. 4. I was feeling sick last night. Me sentía mal anoche. 5. I am not sick today. No estoy enfermo/a hoy. 6. If I were sick, I would stay home. Si estuviera enfermo/a, me quedaría en casa. 7. I have never been sick during the winter. Nunca he estado enfermo/a durante el invierno.