为什么不能在konw后面直接加not 比如i don't konw how to do it.

为什么不能在konw后面直接加not 比如i don't konw how to do it. I don't konw what to do.=I don't konw how to do it .为什么what不 I really don't konw how to do about it don't konw what to do about it don't konw how to do about it but I do not konw how to do it i don’t konw ().B.what to do C.how to do it 我觉得两个都选,这道题好奇怪.. But I don't konw how to make a card. god,i don t konw how to do 是那首英文歌曲里的 i don't konw how to call it in English 等于 I don not konw I don't konw I don‘t konw