Then I [will] sing a song for you.
If you want to be pedantic, the last bit should really read "dann ich werde ein Lied für dich singen". And Zeit is a noun, so it needs a capital.
( The Mock TurtIe ™ --- Thinks you are a cunt, on, Fri 29 Jan 2010, 22:44, archived)

I didn't use a translator or copy it. I impressed myself.

( St. Defenestration The REAL one, Fri 29 Jan 2010, 22:48, archived)