what引导名词性从句用法What在从句中作成分（主语、宾语、表语），有实意。1. 表示“的东西或事情”：Theyve donated what they have to help her. You can have what you want.2. 表示“的人或的样子”：He is no longer what he was. China is no longer what it used to be.He is what is generally called a hero. Who made Fred what he is now? 3. 表示“的数量或数目”：Our income is now double what it was ten years ago. The number of the students in our school is ten times what it was before liberation. 4. 表示“的时间”：After what seemed like hours
