Watch the Single Note Swing online guitar lesson by Jasper Mortier from 50 Blues Bass Licks You Must Know
A good example of this kind of Single Note Swing 8-bar would be Key to the Highway, by Big Bill Broonzy or Little Walter for instance. When it comes to playing a bit different form like this: try to get the vocal in your head while the song is progressing and 'practice' the chart while the vocal is still there. When a solo comes try to keep this vocal in the back of your head, because a solo can be very distracting and make you forget the form. More experienced soloist however will often play something in style with the song (a.k.a. the melody) making it easier to keep on recognizing the form.