Student or Learner
Those are two sentences:
Sara cleaned the house before her mother came to visit.
Sara had cleaned the house before her mother came to visit.
I think they have similar meaning. Am I right?
Event 1: Sara (had) cleaned the house before ...
Event 2: Her mother came home.
I agree with you Soup, I have learned that from my grammar book. We can use just past simple tense when a "before" or "after" is there, because it's already implied by their use; which action took place first. However, when we use "when"; this time we have to use both of the present perfect and the past simple or other tenses inorder to clarify which action came first and so on.
Thanks alot everyone for your help.