YOU SAID:
I'm pretty sure she would have seen it through.
INTO JAPANESE
彼女はそれを見ていたはずだと確信しています。
BACK INTO ENGLISH
I'm sure she should have seen it.
INTO JAPANESE
彼女はそれを見るべきだったと確信しています。
BACK INTO ENGLISH
I'm sure she should have seen it.
Come on, you can do better than that.