要针对疑问的部分用词，什么时候？（when）哪里？（where）为什么？（why）什么?(what) eg： 1、This is an apple. 针对“苹果”，Is there an apple? 针对“数量”，Are there any apples? There is an apple. 2、It's 5 o'clock now."现在5点" What's the time now?“现在几点？”
