Study

For or Since?

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  • I've studied ____ 2 weeks.
    for
  • I've taught this lesson ____ 10 minutes.
    for
  • I've been in class ______ 10 o' clock.
    since
  • I've lived here ______ 2017.
    since
  • The weather hasn't changed ____ this summer.
    since
  • They've been married ____ 6 years.
    for