YOU SAID:

my dog sleeps under the sofa and the cat bites him on the paw

INTO JAPANESE

私の犬がソファの下で寝ていて、猫が彼の足を噛んでしまいます。

BACK INTO ENGLISH

My dog is sleeping under the couch and the cat bites his leg.

INTO JAPANESE

私の犬がソファの下で寝ていて、猫が犬の足を噛みました。

BACK INTO ENGLISH

My dog was sleeping under the couch and the cat bit his leg.

INTO JAPANESE

私の犬がソファの下で寝ていて、猫が彼の足を噛んでしまいました。

BACK INTO ENGLISH

My dog was sleeping under the couch and the cat bit his leg.