This is Video 5 in the series "Personalizing" your play, or "How to create your own style." If you have not yet watched the introduction to this series, please do so, as otherwise this will make no sense!
In the following clip. we are hammering-on each fretted note in our example. Note that our left hand fingering becomes different this time, as each of those fretted melody notes now sounds 1/2 beat later than it does in our "basic melody." This, the delay (or anticipation) of a beat is call "syncopation," and it gives us a very interesting effect.
For best results, you should practice doing this quite literally on every other beat, i.e., you want to teach your left hand to be able to hammer-on to each and every fretted note, whether it sounds good or not! Once mastered, you will be able easily to leave out unwanted hammers.
Watch this video clip in which we hammer-on to melody notes.