・I will tell you the shortest way. 一番の近道を教えてあげよう.

・I will (be happy to) tell you all that I know. 知っていることをすっかり(喜んで)話そう.

・I have been told the whole truth.＝The whole truth has been told (to) me. 真相を残らず教えてもらった.

・tell the news to everyone そのニュースを皆に知らせる.

・tell a person about [of] an accident 人に事故を報じる《★of の方が形式張っている》.

・He told me (that) you were coming. 君が来ることは彼から聞いた《★この構文における受動態は I was told that… で, It was told (to) me that…は《まれ》》.