Tunisian Crochet Basics & Stitches

Foundation Row
Insert hook and pull up loop in back loop of second chain from hook and in each chain across, work standard return pass as described below.
Tunisian Simple Stitch  Insert hook from right to left under vertical bar of next stitch. Yo, pull up loop and leave on hook. Repeat until all loops on hook.
Return PassWithout turning the piece, yo, draw through 1 lp, *yo, draw through 2 lps; rep from* to end.
Tss in last barWork under both front and back vertical bar of last stitch and draw up a loop
Finishing Row*Insert hook in next stitch as for tss, draw lp through stitch and lp on hook (=tunisian slip stitch); repeat from * to end. Finish off.
How to work foundation row on top of existing rectangleJoin yarn at the top right edge of rectangle just completed. Insert hook into next stitch and draw up loop. Repeat for each stitch across. Work standard return pass.
How to join/change new color at the end of forward passHaving worked tss in last bar, yarn over with working yarn and secure yarn with your right forefinger. Pick up second color and pull through two loops. Continue standard return pass (=yo, pull through two).
Tunisian Knit StitchWith working loop on hook, insert hook between  front and  back vertical loop, yarn over, pull up loop.
2 Tunisian Simple Stitch together (2tsstog)Insert hook under vertical bars of next 2 stitches and pull up loop.
Tunisian Diamond StitchInsert hook from right to left under front vertical bars of next two stitches, pull up loop. Insert hook again in vertical bar of first stitch just worked and pull up loop.
Tunisian Purl Stitch (Tps)With working yarn in front of work, insert hook from right to left under front vertical baar of next stitch, yo, pull up loop. For most people, this stitch requires some patience and practice.
Single DecreaseInsert hook from right to left under front vertical bars of next 2 stitches, yarn over and pull up loop.