They seemed that they were under threat in some ways.

英訳に間違いが有れば正してください。

ある意味、彼らは脅威にさらされているようでした。
They seemed that they were under threat in some ways.

ヒント
構文

答え
TheyをItにする
または
that they wereをto beにする

It seemed that they were under threat in some ways.
They seemed to be under threat in some ways.

it+seem+that節
that節のように主観的に判断できる

主語+seem+to+be+~
主語が~と主観的に判断できる