Question

訪客

第五句可以寫you will not know…
第六句可以寫people will not…
嗎？

5. You know the value ofamoment only when it becomes amemory.

You do not know the value ofamoment until it becomes amemory.

6. People realize the importance of good health only when they become sick.

People do not realize the importance of good health until they become slck.

Answer 1

訪客

不行，後面的句子是現在式，連接詞左右時態一致