Identify the correct sentence.

• প্রশ্নে উল্লেখিত বাক্যগুলো conditionals sentence এর উদাহরণ। 
- conditionals এর নিয়মানুযায়ী - What would have happened if the road had broken? এই বাক্যটি সঠিক।

• উক্ত বাক্যটি  3rd Conditional Sentence.
- 3rd Conditional = If + Past Perfect (had +V₃) + Perfect Modal (S + would have/could have/might have + V₃)
- বা would have/ could have/ might have + V₃ বাক্যের শুরুতে থাকলে if যুক্ত clause এর structure - if + past perfect + verb এর past participle form.
- যেমন - What would have happened if the road had broken.

• একটি Conditional sentence এ দুটি অংশ থাকে।
1. Condition বা শর্ত 2. Consequence বা ফলাফল।এ ধরনের বাক্যগুলোর সাধারণ structure হলো:
• Zero Conditional = If + Present + Present (shows scientific and general truth)
• 1st Conditional = If + Present + Future
• 2nd Conditional = If + Past Simple + Future in Past (S + would/might/could + Base Form of the Verb)
• 3rd Conditional = If + Past Perfect (had +V3) + Perfect Modal (S + would have/could have/might have + V3)

অন্য অপশন গুলোর মধ্যে - 
• If you help me, I will be remain grateful - ভুল কারণ will be remain এর স্থলে will remain হবে।
• Had I known you were coming, I would have stay at home ভুল কারন have এরপর verb এর past participle হিসেবে stayed হত।
• If he agreed to stay till Friday, I will throw a party for him - বাক্যে agreed এর স্থলে agrees হলে শুদ্ধ হত।