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