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ENGLISH (Child Rights (Vocabulary: (AIDS: sida, appalling: pésimo, bond:…

- - - - There are various modal auxiliary verbs, many falling into pairs, e.g. can/could, may/might, shall/should, will/would, must, ought to and dare.
      - Can is an auxiliary verb, a modal auxiliary verb. We use can to:
        
        • talk about possibility and ability
        
        • make requests
        
        • ask for or give permission
  - - - positive: subject + auxiliary verb + main verb
      - negative: subject + auxiliary verb + not + main verb
      - ? question: auxiliary verb + subject + main verb
- - - - talk about past possibility or ability
      - make requests
    - - Subject + could + main verb
      - The main verb is always the bare infinitive (infinitive without "to").
- - - - for a precise time.
    - - for month, years, centuries and long periods.
    - - for days and dates.