4. As far as I know/as far as I am aware These two expressions are used when you have partial (incomplete) knowledge of an issue or fact. 如果你对某个问题或事实了解得不是很全面,就可以用这两个表达。 例句: No one has complained, as far as I know. 就...
6. Not as far as I know We use this to say that something may be true, but you do not have enough information to know whether it is or not. 当你认为某件事可能是真的但又不确...
更多内容请点击：如何用英语表达“不确定”?