回答

・To the best of my knowledge
・Not that I know of

As far as I know 我感覺這是最標準的句型，To the best of my knowledge 或Not that I know of 也是與As far as I know有著比較相近的意思。
我希望你要注意的一點是光是使用Not that I know of 就指的是「據我所知，我認為情況並非如此」。

例句
To the best of my knowledge, You've never told me to do homework.
（據我所知，我想你從來沒有叫過我做功課）

You can be smart just by taking this medicine?? Not that I know of, but it could happen.
(只要服用這種藥就會讓你變得更聰明！？據我所知，我認為並非如此、、、但也是有可能的吧。）

有幫助｜0