how can this can be check mate


ur king is trapped, you need to move out of check or kill the attacker (queen). None of your pieces can take the queen, not even the king because you would be moving into check which is illegal.

sorry i dont understand, i could easy move
Kg2
KG2 does not work because you are moving yourself into check, this is illegal. If you want to think of it another way if it was legal the pawn would eat that king after Kxg2 anyway.