YOU SAID:

my girlfriend is really stupid, I hope it's just an act but my guess is that it isn't

INTO JAPANESE

私のガール フレンドは本当に愚かな行為だけであるが、私の推測は、それはないと思います

BACK INTO ENGLISH

I think my girlfriend is just really stupid, but my guess is that it is not

INTO JAPANESE

私のガール フレンドは本当に愚かな、しかし、私の推測では、それはないと思う

BACK INTO ENGLISH

My girlfriend is really stupid, I guess, it is not, however, think

INTO JAPANESE

私のガール フレンドは本当に愚かな、私は推測、ただしはありませんと思う

BACK INTO ENGLISH

I think my girlfriend is really stupid, I guess, however, there are no

INTO JAPANESE

私は私のガール フレンドは本当に愚かだと思うね、しかし、ないです。

BACK INTO ENGLISH

I think my girlfriend is really stupid, but it is.

INTO JAPANESE

私は私のガール フレンドは本当に愚かだと思います。

BACK INTO ENGLISH

I think my girlfriend really stupid.

INTO JAPANESE

私は私のガール フレンドは本当に愚かなと思います。

BACK INTO ENGLISH

I think I my girlfriend is really stupid.

INTO JAPANESE

私は思う私のガール フレンドは本当に愚かです。

BACK INTO ENGLISH

I think my girlfriend is really stupid.

INTO JAPANESE

私のガール フレンドは本当に愚かだと思います。

BACK INTO ENGLISH

I think my girlfriend is really stupid.