Although she has a lot of books, she wants to buy more. (Make it simple)

- প্রশ্নোক্ত বাক্যের 'Simple Sentence' হচ্ছে In spite of his having a lot of books, he wants to buy more.
• Complex sentence: 
- যে sentence এ একটি Principal clause এবং এক বা একাধিক Subordinate clause থাকে, তাকে Complex sentence বলে। 
- Complex sentence এর subordinate clause এর শুরুতে সাধারণত if, though, although, as, because, since, so that, that, until, till, unless, when, why, who, which, where, how, before, after, whether, while বসে।

• Though/Although যুক্ত Complex sentence কে simple form এ রূপান্তর করার নিয়ম:
- Though/Although এর স্থানে In spite of ব্যবহার হবে + subject এর possessive form + am/is/are/was/were এর স্থানে being অথবা has/have/had এর স্থানে having অথবা verb+ ing ব্যবহার হবে + বাকি অংশ + ২য় clause.

Example:
Complex: Though I tried hard, I failed in English.
Simple: Despite/Inspite of my trying hard, I failed in English.

Complex: Although she has a lot of books, she wants to buy more.
Simple: In spite of his having a lot of books, he wants to buy more.