加过去完成时，例如：

1.Did you know women are more likely than men to feel exhausted?你知道女性要比男性更容易感到疲惫吗?

2.Did you know there were other people after her too， Mycraft.你知道还有别人在追杀她吗麦克罗夫特

3.Did you know I didn't have any power?知道吗我什么权力都没有

4.How did you know? How would I not?你怎么知道的我怎么不知道