Took the boy
By the hand.
He lifted him up.
The boy was able
ὁ δὲ Ἰησοῦς κρατήσας τῆς χειρὸς αὐτοῦ ἤγειρεν αὐτόν, καὶ ἀνέστη.
This is unique to Mark, who said that Jesus took the boy by the hand (ὁ δὲ Ἰησοῦς κρατήσας τῆς χειρὸς αὐτοῦ). He lifted him up (ἤγειρεν αὐτόν) so that he rose up, able to stand up by himself (καὶ ἀνέστη). The boy was not dead. Jesus helped him to get to his feet.