Question

My teacher has been working here _____ ten years.

• A. for
• B. since
• C. from
• D. by

Answer 1

Answer:

A. for

We use for to express a length of time (duration).

• ✅ for + period of time

  • for ten years

  • for two hours

  • for a week

We use since to indicate the starting point of an action.

• ✅ since + point of time

  • since 2016

  • since Monday

  • since morning