The following example uses the note B b in the middle register. It is written above the first ledger line above the staff. As with the notes E, F and G, the fingering is the same as B b in the low register.
Another common way of creating syncopated rhythms is the use of ties. Here is a rhythm similar to the one used to introduce eighth notes. The difference is that it uses ties instead of rests on the beat.
This well known Caribbean song makes very effective use of syncopated rhythms using ties. It is written here in the key of F Major. Once you have memorised it in this key, try transposing it to G Major.