Essential Points

การใช้ modal verbs ในการเขียนเรียนช่วยเพิ่มความละเอียดและแสดงความมั่นใจ, ความเป็นไปได้, ความจำเป็น, หรือการให้อนุญาต. นี่คือคำแนะนำเกี่ยวกับวิธีใช้ modal verbs ในเรื่องการเขียนเรียน

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1. Expressing Certainty การแสดงความมั่นใจ

   • Must: Use "must" to convey strong certainty.

     • Example: The government must implement stricter environmental policies.

   • Can't: Use "can't" to express strong certainty in the negative.

     • Example: It can't be denied that climate change is a pressing issue.

2. Expressing Probability การแสดงความเป็นไปได้:

   • May/Might: Use "may" or "might" to indicate possibility or probability.

     • Example: Technological advancements may lead to a more sustainable future.

   • Could: Use "could" to suggest a possibility or potential.

     • Example: Renewable energy sources could revolutionize the energy sector.

3. Expressing Necessity or Obligation การแสดงความจำเป็นหรือความนโยบาย:

   • Should/Ought to: Use "should" or "ought to" to express necessity or obligation.

     • Example: Individuals should take responsibility for their carbon footprint.

   • Have to/Must: Use "have to" or "must" to convey a strong sense of obligation.

     • Example: Society must prioritize the conservation of natural resources.

4. Expressing Permission การให้อนุญาต:

   • Can/May: Use "can" or "may" to indicate permission.

     • Example: Individuals can make a difference by adopting eco-friendly practices.

   • Could: Use "could" to express a polite request or permission.

     • Example: Could citizens be encouraged to use public transportation?

5. Expressing Ability การแสดงความสามารถ:

   • Can: Use "can" to indicate the ability to do something.

     • Example: Technology can facilitate efficient waste management.

   • Could: Use "could" to suggest a potential or hypothetical ability.

     • Example: With proper investment, communities could develop sustainable practices.

6. Expressing Advice การให้คำแนะนำ:

   • Should/Ought to: Use "should" or "ought to" to provide advice.

     • Example: Governments ought to invest in renewable energy for long-term benefits.

   • Could: Use "could" to offer a suggestion or idea.

     • Example: Individuals could reduce their carbon footprint by using public transportation.