Harmonic progressions JCF Bach

[quaver]

I have attached two pages of Allegro in G+ by JCF Bach.  I am trying to study harmony and I would really appreciate it if someone could look it over and tell me if I am on the right track.  Thankyou so much.  (Maybe I should be quiver instead of quaver).

[keyboardclass]

Looks like you did a good job.  In the first green circled you missed the Vb in the third beat. I'll play through later.  Looks fun.  Will sound great on my clavichord!

[quaver]

Thanks so much.  Would you agree however that G major would have re-appeared (must be a more technical word) at measure 21 instead of measure 22.  So measure 21 would read V6/5 on the first beat and tonic chord on the third beat.  Also measures 18, 19, 20 are all i chord of a minor.  Is this usual for a chord to last three measures.  Just curious.  Thanks for helping me out.  Measure 32 shoud have been 1st inversion, thanks for pointing that out.  I have now corrected it.  Gracie tanti.

[keyboardclass]

I would say the fifth note RH in bar 20 is V in G.  Bar 18 is I-V in a, 19 I-V-I.  This is a delightful piece, not very consummate though so you need to work out what he's trying to do with the harmony and then bring it out.