How to read tablature? 
Verse 1:
C                                       Dm       G7      C
O Christmas-tree, O Christmas-tree, how faithful are thy leaves;
    C                   Dm
You bloom with summer’s fairest rose,
    G7              C
and in the winter’s bitter snows;
C                                       Dm       G7      C
O Christmas-tree, O Christmas-tree, how faithful are thy leaves!

Verse 2:
C                                       Dm           G7   C
O Christmas-tree, O Christmas-tree, thy leaves teach me a lesson;
    C                  Dm
For they give hope and constancy,
     G7                   C
give strength and courage unto me;
C                                       Dm           G7   C
O Christmas-tree, O Christmas-tree, thy leaves teach me a lesson!


the German original, August Zarnack, 1820:

C                               Dm        G7    C
O Tannenbaum, o Tannenbaum, wie treu sind deine Blätter!
   C                    Dm
Du grünst nicht nur zur Sommerzeit,
     G7                      C
nein auch im Winter, wenn es schneit.
C                               Dm        G7    C
O Tannenbaum, o Tannenbaum, wie treu sind deine Blätter!


A|----|----------------|----------------|----------------|--------|
E|----|----------------|-0---0---0---0--|-----0---1---0--|--------|
C|----|-0---0---0---2--|----------------|-2--------------|-2---0--|
g|-0--|----------------|----------------|----------------|--------|

A|----|---------0------|----------------|----------------|------------|
E|----|-----0----------|-----1---1---1--|-1-----------1--|-1---0---0--|
C|----|----------------|----------------|-----2----------|------------|
g|-0--|-0-----------0--|-0--------------|---------0------|------------|

A|----|----------------|----------------|----------------|--------|
E|----|----------------|-0---0---0---0--|-----0---1---0--|--------|
C|----|-0---0---0---2--|----------------|-2--------------|-2---0--|
g|-0--|----------------|----------------|----------------|--------| This arrangement is its contributor’s own interpretation, shared for private study, education and non-commercial use. The underlying song, lyrics and music remain the property of their copyright owners. To request removal, see Legal & Copyright.