The children don't know about that you can do something with the intent to deceive.

儿童并不知道,人们可以出于欺骗而去做某事

耶鲁公开课 - 心理学导论课程节选

Use the "Is there" whenever you want to ask if something exists.

当你想知道某事或某物是否存在时，就可以使用“Is there”句型。

Is there 课堂 - SpeakingMax英语口语达人