Never try to learn your chords by rote! It’s all about patterns, man!
In this video, you’ll learn that there is one simple pattern (“major-minor-minor”) that every Dominant Seventh chord shares. Learn this one pattern, and you will be able to learn EVERY Dominant 7 chord in one sitting (about one hour). There is no need to memorize each one separately!
Over time, you will start to have the most commonly used dominant seventh chords at your finger tips, but with this system here, you will immediately be able to build any dominant 7 chord from any root, and always be certain that you are using the right notes!