Here is the chord Cmaj:
C E G.
If we want Csus4, we raise the second note to the next note on the key scale, in this case, Csus4 is C F G.
If we want Csus2, we lower the second note to the next note on the key scale, in this case, Csus2 is C D G.
Dmaj: D F# A
Dsus4: D G A
Dsus2: D E A.
Remember, sus4 = raised second note to next scale note.
Sus2 = lowered second note to next scale note.
Activity: Work out the chords. The first two have been done for you.
1) Esus4: E A B
2) F# B E: Esus2 1st Inversion.
3) B C# F#: _____________
4) Gsus2: ______________
5) Dminsus2: ______________
6) G# C# F#: _______________