how to check work
Correct chord members
Resolutions (including holding the chordal seventh on Ab until it can resolve to G)
Double the fifth in 6/4 chords
No parallel fifths or eights
Spacing
common errors
Omitting the accidental
Spelling the chord incorrectly (not putting the sharp sign)
Omitting the root
Parallel fifths between the bass and tenor
When V7 goes to I or i, if the V7 has all four members,
then the tonic chord will have three roots, one third, and no fifth.
If the V7 is not complete
then that will lead you to a complete tonic triad.
Leading-tone chords will have
three resolution tones