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១.  If និង when

អ្នករាល់គ្នាប្រហែលជាមានការភ័ណ្ឌច្រឡំក្នុងការញែកការប្រើប្រាស់ពាក្យ “When” និង “If”។ សាកល្បងពីពណ៌នាភាពខុសគ្នានៃប្រយោគទាំង២ខាងក្រោម៖

  • If the doctor comes, can you let her in?
  • When the doctor comes, can you let her in?

ក្នុងប្រយោគទី១​ ពេទ្យប្រហែលជាមក (The doctor might come)។ ចំពោះប្រយោគទី២ ពេទ្យនឹងមក (The doctor will come)។

២. បង្រួញប្រយោគ

យើងអាចធ្វើការបង្រួញប្រយោគដោយការប្រើប្រាស់ “if” តែមិនមានកិរិយាស័ព្ទ។

ឧទាហរណ៍៖

  • I’d like a room facing the street if (that is) possible.
  • If (you are) in difficulty, ring this number.

៣. As long as, provided etc

ក្រៅពី “As long as” យើងក៏អាចប្រើប្រាស់ “as/so long as” និង provided/providing (that) ដើម្បីបង្ហាញពីលក្ខខណ្ឌ (condition)។

ឧទាហរណ៍៖

  • You can renew a book in writing as long as/so long as you give its number.
  • I don’t mind you using my bike provided (that) you take care of it.
  • We are willing to accept your offer providing (that) payment is made within seven days.

៤. What if និង​ Suppose/Supposing

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ប្រយោគដែលប្រើប្រាស់ពាក្យទាំងនេះគឺជាទូទៅមិនមាន main clause នោះទេ។

ឧទាហរណ៍៖

  • What if the tickets don’t get here in time?
  • Suppose/Supposing there’s nowhere to park?

៥. Unless

  1. Unless means “if……not”

We are going to have a picnic unless it rains (if it doesn’t rain).

You can renew a book unless another reader has requested it.

  1. “And” និង “Or”

យើងអាចប្រើប្រាស់ពាក្យ “And” ឬ “Or” ដើម្បីបង្ហាញពីលក្ខខណ្ឌ (ជាពិសេសនៅក្នុងការនិយាយ​ក្រៅ​ផ្លូវការ)។

ឧទាហរណ៍៖

  • Touch me and I will scream. (= If you torch me, I will scream)
  • Go away or I will scream. (= Unless you go away, I will scream)

៦. In case VS If

ឧទាហរណ៍៖

  • I will draw some money out of the bank if I need it. (=I will draw it out at the time when I need it.)
  • I will draw some money out of the bank in case I need it. (=I will draw it out because I might need it later.)

៧. Even if និង​ Whether … or

ឧទាហរណ៍៖

  • I wouldn’t go on a camping holiday, even if you paid me. (NOT: I wouldn’t go even you paid me.)
  • Joanne wouldn’t want a dog even if she had room to keep one.
  • She wouldn’t want a dog whether she had room for one of not.
  • Whether it is summer or winter, our neighbor always wears a pullover.
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