True: Future time clauses show the time relationship between two future events, The verb in the time clause is in the present tense, When the time clause comes at the beginning of the sentence, put a comma after the time clause, Before, until, by the time introduce the event that happens second, False: The verb in the main clause is in the present tense, We should use will or be going to in the time clause, while introduces the event that happened first, We should use a comma if the time clause comes at the end,

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