彼の名前が喉まで出かかっていたが、思い出せなかった。

tbd

His name was on the tip of my tongue, but I couldn't remember it.

言葉が口先まで出かかっているのだが、自分のいいたいことをどう表現したらいいのかよくわからない。

tbd

The words are on the tip of my tongue, but I don't quite know how to say what I want to say.

The words are on the tip of my tongue, but I don't quite know how to put what I want to say.