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• Lifestyle can affect the functioning of the respiratory and circulatory system
• Unhealthy lifestyle weakens the systems and increases the risk of diseases
• Cigarette smoking

  • Increases the risks of having different diseases and infections in the whole body
  • Causes lungs to appear dark and muddled, and heart to be enlarged
• Good health

  A state of complete physical, mental and social well-being, not just the absence of disease or illness
• Examples of healthy lifestyle practices

  • Balanced diet
  • Regular exercise
  • Enough rest and sleep
  • Staying hydrated
  • Reducing stress
• Washing hands with soap and water removes virus, bacteria and other microorganisms
• Negative lifestyle weakens the system, while healthy lifestyle leads to complete wellness
• Living a healthy lifestyle can help prevent chronic diseases and long-term illnesses
• Feeling good about yourself and taking care of your health are important for self-esteem and self-image
• time check it's English o'clock in English
• hello grade nine thank you for tuning in to English teacher nihuan are you ready with your first lesson
• Target most essential learning competency for this video

  Express permission obligation and prohibition using modals
• Modal verbs


  Used to express something that can probably certainly or possibly happen<|>Give additional information about the function of the main verb that follows it<|>Have a great variety of communicative functions
• Skills in using modals which express prohibition obligation and permission

  1. Learn

  2. Discuss
• Prohibition

  Prevent forbid stop or disallow someone from doing something
• Modals used for prohibition

  • Can't or cannot
  • Mustn't or must not
• Can't


  • You can't go in that hotel wearing slippers
  • You can't drive in this country unless you are over 18
• Mustn't

  • You mustn't use your phone in class
  • You mustn't sleep late
• Obligation

  A Duty or commitment
• Modals used for obligation

  • Have to
  • Must
• Have to

  The obligation comes from someone else not the speaker<|>Referring to a rule or law
• Have to


  • I have to work on Saturday because your boss requires you
  • They have to wear their uniforms in school because that is the school policy
  • My doctor said that I have to stop smoking or I'll risk serious problems
• Don't have to

  There is no obligation<|>You can do something if you want but it is not an obligation
• Don't have to

  • You don't have to pay your bills in advance
  • You don't have to wear a tie to go to that restaurant
  • You don't have to wait for me
• Must

  The obligation comes from the speaker
• Must

  • I must hand in my thesis by tomorrow
  • I really must call my parents
  • I must stop smoking it's costing me too much money
• Permission

  Allowing someone to do something
• Modals used for permission

  • Can
  • Could
• Can


  • Can I borrow a pen
  • Can I go now
• Could

  • Could I open the window
• time check it's English o'clock in English
• hello grade nine thank you for tuning in to English teacher nihuan are you ready with your first lesson
• Target most essential learning competency for this video

  Express permission obligation and prohibition using modals
• Modal verbs


  Used to express something that can probably certainly or possibly happen<|>Give additional information about the function of the main verb that follows it<|>Have a great variety of communicative functions
• Skills in using modals which express prohibition obligation and permission

  1. Learn

  2. Discuss
• Prohibition

  Prevent forbid stop or disallow someone from doing something
• Modals used for prohibition

  • Can't or cannot
  • Mustn't or must not
• Can't


  • You can't go in that hotel wearing slippers
  • You can't drive in this country unless you are over 18
• Mustn't

  • You mustn't use your phone in class
  • You mustn't sleep late
• Obligation

  A Duty or commitment