Mostly the Perfect 4th across two adjacent strings

In this exercise, we practice using two fingers to fret two adjacent strings on the same fret.

Depending on guitar tuning, usually most pairs of adjacent strings has this perfect 4th offset, or 5 half steps.

except G-B pair of adjacent strings in standard E tuning, which is a Major 3rd offset, or 4 half-steps.

This is an exercise to familiarize yourself with listening to the sound of the perfect 4th interval.

and to practice one of the most fundamental aspects of guitar playing, and guitar design, which is the perfect 4th.

This exercise should be practiced using every pair of fingers, on every pair of adjacent strings, on every fret.

The song “Here Comes The Bride” is one easy way to practice, and to remember, the sound of a perfect 4th interval.

Here-comes-the-bride = E-A-A-A etc

Practice listening to the sound of that perfect 4th interval on every possible pair of adjacent strings and frets

Except!

The G-B strings in standard E tuning,

Which will require you to fret the B string one fret higher, to get the perfect 4th interval.

Then verify that ‘Here Comes The Bride’ sounds correct on G-B strings, on all frets, with all possible finger pairs.