how to tie?

[Jinsong Zhao]

Hi there,

I use the following code to input the figure attached. 

\version "2.19.83"
\relative c, {
  \clef "bass"
  \key g \major
  \time 3/4
  << {s4 <b' fis'>2 ~ } \\ {<b, fis'>2.} >> |
  <b' fis'>2. ~ |
  <b fis'>2.
}

However, it did not give the first tie. Any hints? Thanks in advance.

Best,
Jinsong