你可以说：He's taking a shower。在中国一般洗澡是shower not bath.

如果是泡大浴盆可以说 he is taking a bath，如果是淋浴可以说taking a shower, 英式好像把淋浴也叫bath

Hello Lori, You can say either "He's taking a bath." or "He's having a bath."