Explanation

I am not concerned with his affairs 

With means 'in the same place as someone or something' or 'accompanying':

She arrived with her boyfriend.

I don't like tea with milk.

There was a free phone with the car.

Explanation

My brother is weak in Mathematics.

میرا بھائی ریاضی میں کمزور ہے۔

The phrase "weak in Mathematics" is commonly used to describe someone who struggles or has difficulty with the subject.

Explanation

Parfect is the incorrect spelling.

The correct spelling is Perfect.

Explanation

Couragious is the incorrect spelling.

The correct spelling is Courageous.

Explanation

Incorrect spelling: Excesive

Correct spelling: Excessive

Explanation

The incorrect spelling is Goverment.

The correct spelling is Government.

Explanation

I do not have any confidant to share my secrets.

میرے پاس اپنے رازوں کو بانٹنے کے لئے کوئی بااعتماد نہیں ہے۔

It refers to a person with whom one shares private matters or secrets, trusting them to keep it confidential.

Explanation

"The new law came into effect last day."

نئے قانون کا اطلاق گزشتہ روز ہوا۔

The phrase "came into effect" means that the law started to be applied or enforced.

Explanation

"If I had worked hard, I would have succeeded."

اگر میں محنت کرتا تو کامیاب ہوتا۔

This is an example of a third conditional sentence, used to express a hypothetical situation in the past and its possible result.

Explanation

I am intent on winning means میں جیتنے کا ارادہ رکھتا ہوں

Generally preposition on is used after intent.