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Simple present tense: tells what is happening now
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Simple past tense: tells what happened before now
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Simple future: talks about what has not happened yet
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Present perfect tense: expresses an action or state of being in the present that has some connection with the past
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Past perfect tense: places an event before another event in the past
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Future perfect tense: talks about something that has not happened yet in relation to another event in the future