YOU SAID:

My dog might have gone to the shop, and bought some cars mrs goggins

INTO JAPANESE

私の犬は店に行って車を買ったかもしれないよ、ゴギンズさん

BACK INTO ENGLISH

My dog could have gone to the store and bought a car, Mr. Goggins.

INTO JAPANESE

私の犬も店に行って車を買うことができたでしょう、ゴギンズさん。

BACK INTO ENGLISH

My dog could have gone to the store and bought a car, Mr. Goggins.