Please explain the use of who/whom.
1.Who/Whom do you think should win the player of the year award?
2.Who/Whom do you want to talk to?
Please let me know if these can be used interchangeably in this context.
Can you please explain to me, why Who?
Please also let me know when we use whom.
Who (do you think) should win...?
David Beckham/He should win...
In your second interrogative sentence who = whom, but who is a far better choice for simple reason - we use who (instead of whom) at the beginning of a question where who is the object of a preposition which is usually put at the end of a sentence; if you put the preposition in front of who, then it's only whom that can be used in such instance:
Who do you want to talk to?
To whom do you want to talk?
However, if who is the object of a verb, then you can use either at the beginning:
Who/Whom shall I call?
The difference is that the use of whom is more formal.