তারা দুর্বল ছিল।

= They were weak.

We write in ink.

The monkey climbed up the mango tree.

I get up in the morning at 6 AM.

I am sure of his success.

This is a unique case.

Come to light = প্রকাশ হওয়া

By dint of = বদৌলতে

International Mother Language Day

International Mother Language Day is celebrated every year on February 21. It honors linguistic and cultural diversity worldwide. UNESCO proclaimed this day in 1999. The day commemorates the events of 1952 in Dhaka, Bangladesh. In 1952, students were martyred for advocating the recognition of their mother language, Bangla. The day highlights the importance of preserving native languages. These languages are crucial for cultural identity and heritage. Events like cultural programs, language festivals, and educational activities are held globally. Schools conduct special classes and activities to raise awareness among students. The day promotes unity and understanding among different linguistic communities.

Work hard or you can not prosper in life (Make it complex). 

= Unless you work hard, you cannot prosper in life.

Twenty years ago, I was leaving in Paris (Make it compound).

= It was twenty years ago and I was living in Paris.

When he was four, he left his village (Make it complex). 

= At the age of four, he left his village.

In spite of his working hard, he failed in the examination (Make it interrogative). 

= Though he worked hard, he failed in the examination.

Karim liked the late spring (Make it interrogative) 

= Didn't Karim like the late spring.

He ran away having taken the money.