YOU SAID:

Brendan is very stupid and he has no friends

INTO JAPANESE

ブレンダンは非常に愚かと彼は友達ではないです。

BACK INTO ENGLISH

Brendan are very stupid and he is not friends.

INTO JAPANESE

ブレンダンは非常に愚かな、彼は友達ではないです。

BACK INTO ENGLISH

Brendan is very stupid, he is not my friend.

INTO JAPANESE

ブレンダンは非常に愚かな、彼は私の友人ではないです。

BACK INTO ENGLISH

Brendan is very stupid, he is not my friend.