know的过去式、过去分词和现在分词
know：现在分词：knowing；过去式：knew；过去分词：known
know：
v. 知晓；知悉；了解；认识；领悟；意识到；确信；确知；肯定
例句：
Without knowing all the facts, it is unwise to comment on the situation.
在未全面了解情况时，对局势妄加评论是不明智的。
Though she knew it was wrong, she wouldn't change it.
尽管她知晓这是错误的，她也不会做出改变。
The true consequences will only be known several years later.
真正的后果只有在数年之后才会被知晓。
