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UNIT 2: Survival NOUN (the state or fact of continuing to live or…

- - - - • Past continuous
        
        We use it for actions that were in progress in the past (not states).
      - • Past perfect simple
        
        We use it to talk about an event that happened before the main event and also to give explanations or reasons.
      - • Past simple
        
        Completed actions and states in the past which happened at a specific time in the past.
      - • Past perfect continuous
        
        We use it before a result in the past to show the effect of an earlier activity.
  - - - MAIN CLAUSE We use: Will, Be going to, Imperative, Modals (can..)
      - SUBORDINATE CLAUSE We use: PRESENT TENSE and If, When, As soon as, Unless = (if not), As long as, Provided (that) =(if only), In case