I know she were a teacher
I know she has ever been a teacher
请问以上两句中know换成 knew,从句是不是都是变成以下这句
I knew she had been a teacher
I know she were a teacher (wrong)
I know she was a teacher. (right)
I know she has ever been a teacher (句末应该有句号)
I knew she had been a teacher (是的,但是句末应该有句号)