Are there any points you are unsure about in the explanation so far?

He fell and got an abrasion on his knee.

Preparedness for the exam is important.

A front vowel is a vowel that is articulated with the front part of the tongue.

Please read the front matter of this book before starting to read the main text.

She was cooking in the kitchen with an apron on.

His live performance was very moving.

He is leaning forward to work on the new project.

We visited a beautiful park to do pre-wedding photography.

I contacted him beforehand.