YOU SAID:

my dog wiggles his tail when he knows who I are

INTO JAPANESE

彼は私が誰であるかを知っているときに私の犬は彼の尾を小刻みに振る

BACK INTO ENGLISH

My dog wiggles his tail when he knows who I am

INTO JAPANESE

彼は私が誰であるかを知っているとき、私の犬は彼の尾を小刻みに振る

BACK INTO ENGLISH

My dog wiggles his tail when he knows who I am