True: If we know WHEN the action happened, we use Past Simple., If we just know that something happened, but we don`t know when exactly, we use Present Perfect., We use Present Perfect to talk about experience., We put "already" and "just" after "have" in Present Perfect., False: If the action started and finished in the past, we use Present Perfect., If the action started in the past and is still continuing in the present, we use Past Simple., Action is finished, but the reasult is important now, we use Past Simple., We use "yet" in all types of sentences (+, -, ?),

True/False Present Perfect/Past Simple

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