All 7th chord types can be played by either hand in four possible inversions, as demonstrated in the following exercise. Once you can play this example, memorize the inversions for each type individually and transpose them to all keys. This is quite a task, but is essential if you wish to play Jazz. Do it for a few minutes each day and you will be surprised how quickly you learn
The most commonly used types of 7th chord are the Dominant 7th, the Major 7th and the Minor 7th. However, it is important to know how to use all the various types of 7th chords. Here are some examples which demonstrate parts using each of the seventh chord types. The first one makes use of major 7ths.
Here’s one using all five types of 7th chords. This is a common Jazz progression known as Rhythm Changes. It originally came from the George Gershwin song I Got Rhythm, and has been used as the basis for many other songs over the years. Once you can play it, transpose it to all the other keys.