English translation of 'जो'
that determiner, pronoun
You use that when you are referring to someone or something which is a distance away from you, especially when you indicate or point to them.
You see that man over there? What's that you're writing? That looks heavy.
what conjunction, determiner
You use what after certain words, especially verbs and adjectives, when you are referring to a situation that is unknown or has not been specified.
I want to know what happened to Norman. She was very embarrassed when she realized what she had done.
You use what at the beginning of a clause in structures where you are changing the order of the information to give special emphasis to something.
What she does remember is that her mother was always there for her.
You use which at the beginning of a relative clause that specifies the thing you are talking about or that gives more information about it.
He was a passenger in a car which was hit by a train.
which pronoun, determiner
You use which to refer back to what has just been said.
I play tennis and go riding, which doesn't interest him. It could be an infection, in which case she needs to see a doctor.
You use who at the beginning of a relative clause when specifying the person or group of people you are talking about or when giving more information about them.
The woman, who needs constant attention, is cared for by relatives. The man gave himself up to police, who are now questioning him.
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Translation of जो from the Collins Hindi to English Dictionary