ORDERED that the judgment is affirmed.
Contrary to the defendant's contention, the trial court properly admitted into evidence the testimony of his former girlfriend concerning his prior uncharged assault against her. The witness was dating the decedent at the time of the shooting, and her testimony concerning the assault was relevant concerning the defendant's motive for shooting the decedent and as background information necessary for the jury to understand the relationship between the parties (see, People v. Ventimiglia, 52 N.Y.2d 350, 359-361; People v. Montanez, 41 N.Y.2d 53, 58; People v. Shorey, 172 A.D.2d 634, 635).
The defendant's contention that the trial court improperly allowed a 10-year-old prosecution witness to give sworn testimony is not preserved for appellate review, as he failed to raise the issue in the trial court (see, CPL 470.05; People v. King, 187 A.D.2d 612, 613). In any event, the contention is without merit, as the record supports the trial court's conclusion that the child witness understood the nature of an oath (see, People v. Diaz, 172 A.D.2d 389; People v. Roger S., 168 A.D.2d 581; People v. McDaniel, 165 A.D.2d 817).
The defendant's remaining contentions are unpreserved for appellate review and, in any event, without merit.