back of the hand

I scratch the back of my hand.

私は手の甲をかきます

I scratch the itchy back of my hand.

私はかゆい手の甲をかきます

I scratch the itchy back of my hand in the garden.

私は庭でかゆい手の甲をかきます

I scratch the itchy back of my hand in the garden after pulling weeds.

私は草を抜いたあとに庭でかゆい手の甲をかきます

I scratch the itchy back of my hand in the garden with my wife after pulling weeds.

私は妻と草を抜いたあとに庭でかゆい手の甲をかきます