Step-by-step explanation:
I. While she is sleeping, she will not study.
II. I waited for my friend until she came.
III. When a fox once met a lion, the fox had never seen a lion before.
IV. You and I are equally strong.
V. I shall come if I am alone.
VI. I do not know whether she may be guilty.
VII. It is certain that she will be late.
VIII. Although she was late, she was allowed to attend classes.