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It's the past continuous tense. For grammer see here.
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It's the past simple tense. For grammar see here.
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It's the present perfect tense. For grammar see here.
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It's the future perfect continuous tense. For grammar see here.
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It's the present continuous tense. For grammar see here.
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It's the future simple tense. For grammar see here
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It's the future perfect tense. For grammar see here