Question

るな

彼の姉だと思った女性は実は彼の母親だった。
The woman I thought who was his sister was actually his mother.
であってますか？

Answer 1

taka

The woman I thought who was his sister was actually his mother.
→　The woman(S1) <who(S2) (I thought) was(V2) his sister(C2)> was(V1) actually his mother(C1).
＜(私が)彼の姉だと思った＞女性は実は彼の母親だった。

参考にしてください。

るな

ありがとうございます🙇‍♀

taka

You're welcome!😊