since you already know your major scale(s), this shouldn't be too hard. for the most part, chords are MAJOR, MINOR, DOMINANT and DIMINSHED. there are many more chords and types - but lets keep it simple.
if a chord is major, use : ionian (1st dgree of a major scale), lydian (4th degree of a major scale) or pentatonic major. (just for simplicity)
if a chord is minor, use : aeolian (6th dgree of a major scale), dorian (2nd degree of a major scale), phrygian (3rd dgree of a major scale) or pentatonic minor - of course the minor blues scale as well.
if a chord is dominant, use : mixolydian (5th degree of a major scale)
NOTE: there are lots more options available, i just wanted to show you a few to get you started.
if you already know your major scale, you already know your MODES. just start on a different note (degree) of the major scale to acheive the different modes. ie; "C" major scale starting on the 2nd note of that scale- "D" and playing up to the next "D" is the DORIAN MODE.
if you memorize this - it should help:
I = major (1st note of major scale and a coinciding major chord starting on the same note) IONIAN (mode name)
ii = minor (2nd note of a major scale and a coinciding minor chord starting on the same note.) DORIAN (mode name)
iii = minor (3rd note of a major scale and a coinciding minor chord starting on the same note.) PHRYGIAN (mode name)
IV = major (4th note and a coinciding major chord starting on the same note.) LYDIAN (mode name)
V = dominant (5th note a coinciding major chord starting on the same note if you are using a triad) MIXOLYDIAN (mode name)
vi = minor- natural minor (6th note of a major scale and a coinciding minor chord starting on the same note.) AEOLIAN (mode name)
vii = diminished (7th note of a major scale and a coinciding diminished chord starting on the same note.) LOCRIAN (mode name)
this is a very BASIC formula for where the modes are found, what sound they have and which scales and chords are good basic starting points. email if you are still unsure.. hope this helps!
Todd
screamnjem77@yahoo.com