I IV V modern - modified and extended major chords

Major chords can be found on the 1st, 4th and 5th degree of a major scale (also see lection Chord Theory → Diatonic Chords). Countless songs are based on these 3 chords, like for example Sweet Home Alabama (Lynyrd Skynyrd) or Brown Eyed Girl (Van Morrison). Some songs like e.g. Leaving On A Jetplane (John Denver), Free Faling (Tom Petty) or Breakfast At Tiffanys (Deep Blue Something) don't even need any other chords.

In very rhythmic music like Reggae [e.g. Three Little Birds(Bob Marley), Stir It Up (Bob Marley), Games Poeple Play (Inner Circle)] you may prefer plain major chords. In other styles like pop, rock or folk music, where each chord is ringing for a longer time or is played arpeggiated, the chords are often modified or extended in certain ways (see lession Chord Types → Major Chords Modern).

To practise the related major chords of a key with modifications and extensions, I gave you several examples of a I IV V chord progression. Mor movement is added with each variation. You can also find the temporarily played notes of the 3rd variation in the chord diagrams. The examples are a great fundament for experimenting with other additional notes or modifications by yourself.

Because you are meant to practise here rather than worrying about theory, the modified/extended chords are not specially named (like add9, sus2, etc.). The chords are just named by the major chords they are based on. Exception: sus4 chords are explicitly noted, because (like explained in the lession mentioned above) sus4 chords should only be used temporarily (alternating with the major chord), when a major chord (and not a sus4) chord is written on the lead sheet.