1. ______
  | sand |                                 = sand box
  |______|

2.   man
   ------------                               = man overboard
     board

3.  stand
   ------------                              = I understand
      I

4. /r/e/a/d/i/n/g/                       = reading between the lines

5.   wear
    ----------                               = long underwear
      long

6.  r
    road                                   = cross road
      a 
       d

7.  cycle
    cycle                                 = tricycle
    cycle

8.
    t
    o                                      = downtown
    w
    n

9.      /      
    le /
      / vel                               = split level
     / 

10.     0
     ------------                          = two degrees below zero
        M.D.
        Ph.D.

11.    knee
      ------------                         = neon light
        light

12.    ii    ii
      -------------                        = circles under the eyes
         O   O

13.  dice
      dice                               = paradise

14.   t
      o
      u                                   = touchdown 
      c
      h

15.    ground
      ---------------
         feet
         feet                             = six feet underground
         feet
         feet
         feet
         feet

16.    mind
      ------------                         = mind over matter
        matter

17. he's / himself                  = he's beside himself

18. ecnalg                            = backward glance

19. death / life                      = life after death