GolfScript, 262 bytes

'Work It
Make It
Do It
Makes Us
Harder
Better
Faster
Stronger
More Than
Hour
Our
Never
Ever
After
Work Is
Over

'2*.n/:a;56,{:i;[i 4%.2&+2*:j a=' '4j+a='jSRSSS]SSSSSST'81base 3i?/3%[' '', 'n]=j)a=+i 51%48/!*' '237118176 2 55i-?/1&i 44%32/'Af-'*5j+a=if j 9/n*n]}/

Try it online!

This is a port of my Ruby answer into golfscript using the same basic algorithm: output the list of tokens twice, then riffle them into the verses and build the verses line by line, adjusting for the peculiarities of each.

There are a couple of differences. The number for the correct mid-line punctuation is in base 81 (conveniently this makes one printable ascii character per verse); and the number encoding whether or not to print the last token is modified because the index is 55-iinstead of i-28 (the latter was found to cause problems with negative powers generating fractional numbers instead of truncating to integer.)

Commented

'Work It
Make It
Do It
Makes Us
Harder
Better
Faster
Stronger
More Than
Hour
Our
Never
Ever
After
Work Is
Over

'2*                                               #make a string of all the tokens twice and push on the stack
.n/:a;                                            #duplicate the string, split into tokens at newline to form array. Assign to a
56,{:i;                                           #iterate through i= (0..55) 
  [i 4%.2&+2*:j                                   #calculate j=(i%4+(i%4&2))*2 to cycle through 0 2 8 10.
  a=' '                                           #leave a[j] on stack followed by space (token A)
  4j+a=                                           #leave a[j+4] on stack (token B))
  'jSRSSS]SSSSSST'81base 3i?/3%[' '', 'n]=j)a=+   #leave ' ' ', ' or newline on stack as appropriate followed by a[j+1] (token C)
  i 51%48/!*                                      #multiply the data described in the previous line by  !(i%51/48)  (1 or 0)
  ' '                                             #leave a space on the stack
  237118176 2 55i-?/1&                            #leave 237118176/2**55-i & 1 on stack (true or false indicates token D required)
  i 44%32/'Af-'*5j+a=                             #leave i%44/32= 0 or 1 copies of 'Af-' on the stack. Leave a[j+5] on the stack.  
  if                                              #depending on value of last but one line, select an option from the previous line.
  j 9/n*n]                                        #leave a newline on the stack. if 9/n is 1 or more (last line of verse) leave an additional newline
}/                                                #close the loop
                                                  #printing done by implied stack dump on program exit.