YOU SAID:

Thinking about that girl.

INTO JAPANESE

あの女の子のことを考えてください。

BACK INTO ENGLISH

Think of that girl.

INTO JAPANESE

あの女の子のだと思います。

BACK INTO ENGLISH

I think of that girl.

INTO JAPANESE

あの子のと思います。

BACK INTO ENGLISH

Think of that child.

INTO JAPANESE

あの子のだと思います。

BACK INTO ENGLISH

I think of him.

INTO JAPANESE

私は彼のだと思います。

BACK INTO ENGLISH

I think of him.