You can't bind off at the end of a row.
What you would do is:
Knit one, Slip, Slip, Knit, or Slip, Knit, Pass
Knit until you have 3 stitches left, knit 2 together, knit 1.
Knit one row, repeat until you have decreased on 7 rows.
Amy has videos here on how to the decreases if you need them.