Help with figured bass on 7th chords

[cometear]

I am using the Fundamentals of Piano Theory book written by Keith Snell and Martha Ashleigh. I am on Level 10, Unit 6: "Seventh Chords." I completed figured bass on Major and minor chords' first and second inversions with not too much trouble. I have just begun figured bass for seventh chords first, second, and third inversions. I have no idea how to do this. The book has an example listed for a CM7 chord. The root is written CM7, the first inversion CM 6/5, the second inversion CM 4/3, and the third CM 2. I understand this works perfectly fine for a Major seventh chord but what about a Dominant seventh chord? How can I possibly signify them by writing figured bass. I could maybe write C7 4/3 but now it doesn't seem correct to have the 7 next to C and the figured bass. Now this also applies to half diminished sevenths and diminished sevenths figured bass. HELP PLEASE!

[lelle]

The numbers will use the scale degrees of whatever key signature your piece is in. So if your piece is in C major and you have a G in the bass with a 7 under it you will get a G7 chord, ie the Dominant 7th chord, because ascending a 7th from G in the C major scale brings you to F, which is the 7th in G7. If you need a chord that uses pitches not present in the key signature you can add accidentals to the numbers:

Notation:

Result:


(Images from wikipedia: https://en.wikipedia.org/wiki/Figured_bass#Accidentals)

[cometear]

I wish I understood. Could someone reexplain it in different terms maybe? Or more like my situation? Sorry lelle I just don't get it completely

[lelle]

Could you post a picture of your book example? This is what I meant, but with a Cmaj7 and a C7 instead: