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

His name is on the tip of my tongue.

It's on the tip of my tongue.

It's that, you know, um, whatchamacallit. It's on the tip of my tongue, but I just can't remember the name!

The words are on the tip of my tongue, but I just can't say it.

It's on the tip of my tongue.

His name is on the tip of my tongue.

The word is on the tip of my tongue.