Saritmiki

I saw this thing of doubling the third in the books I have..:) Btw could you seen the image that I put here? I really have to know if what I did was right...

Thanks I'm trying to understand the common ways to write the bass progressions. I have exercises and I have to write them in 3 different arrangement but it's complicated he want to follow real close the rules. Regarding doubling notes I know that in a V-VI I have to double the third in VI but in VI-V happen the same? In what other progressions there is doubling of notes? I add here an image with the exercises if I'll know what I did wrong it would help me Imageshack - 98395290

Hi guys I'm new here :) I'm learning by myself harmonic progression I'll be glad if you can help me with the questions I have if this is not the right place for my questions tell me. In the VI-IV in Bb+ I put G in the bass that goes down to Eb so do I have to go up to Eb or down to Eb? how I know what to do? In II- V in minor key Eb- again I'm not sure if the notes in bass should go down or up in one book I have it shows to go up and in other down from F to Bb... In iii vi in C#- I have to go down in the bass? Any help is welcome and sorry for my english