Present Simple Tense:

She works as a teacher at the local elementary school.He cleans houses for a living.The mechanic fixes cars at the garage down the street.The nurse takes care of patients at the hospital.The accountant handles the finances for the company.

Past Simple Tense:

She worked as a teacher at the local elementary school for five years.He cleaned houses for a living before starting his own business.The mechanic fixed cars at the garage down the street for over a decade.The nurse took care of patients at the hospital until she retired.The accountant handled the finances for the company before moving to a different city.