Basic Crochet Stitches

Chain Stitch-First make a loop just formed (which will be referred to as a lp), by grasping thread, one or two inches from end, between thumb and forefinger of left hand; holding main length of thread in
right hand, bring it across in front of short end, forming a Ip as shown in Figure 1.

Hold crochet hook in right hand as shown in sketch, insert hook in lp just formed, catch main length of thread and pull through lp (Fig. 2).

Pull both threads to tighten lp on hook. You are now ready to make first ch St. Do not remove crochet hook from thread.
Hold hook in right hand as shown in Figure 3, hold main thread in left hand, wrap thread once around little finger, bring thread in front of ring and middle fingers and behind forefinger; hold Ip between thumb and middle finger of left hand, pass hook under thread and pick up this main length of thread on hook-called a “thread over,” with one motion, draw through lp for a ch St.

For practice make a ch any desired length; on this foundation ch you can work nearly any st you wish. To make the second or following st always insert hook in next st on ch of previous row, skipping the sts
necessary at beginning of ch or row as explained in each St.

Make Foundation Ch To Work Each Of The Following Sts
Slip Stitch: Insert hook in second st from hook, thread over and, with one motion, draw through both the st and lp on hook. The sl st is used for joining, when an invisible st is desired or to give a tight finish
along an edge.
Single Crochet: Insert hook in second st from hook, thread over and pull through st (2 lps on hook), thread over and pull through both lps on hook. For second and all successive rows of sc, ch 1 to turn work.
To begin from other end, insert hook in top of next st, picking up both lps of stitch. When only the back Ip is picked up it forms a rib and is often referred to as a rib st (sometimes called slipper st).

Half double crochet or Short Double Crochet: Thread over, insert hook in third stitch from hook, draw thread through (3 Ips on hook), thread over and pull through all lps at once. For succeeding rows, ch 2 to turn.

Double Crochet: Thread over, insert hook in fourth st from hook, draw thread through (3 lps on hook), thread over and pull through 2 lps on hook, thread over and pull through last 2 lps. For succeeding
rows, ch 3 (counts as a dc) to turn, work next dc in second dc of previous row.

Video tutorial:

Treble Crochet-Thread over twice, insert hook in 5th st from hook, draw thread through (4 Ips on hook), thread over hook, pull through 2 Ips, thread over, pull through 2 Ips, thread over, pull through 2 lps.
For succeeding rows, ch 4 (counts as a tr), turn and work next tr in second tr of previous row.
Joined Treble-Make a ch desired length, turn, sk 3 sts. tr in next st, * ch 2, tr in same place where last tr was made (hold last lp of each tr on hook), sk 2 sts, tr in next st (3 lps on hook), thread over and draw
through all lps on hook for a joined tr; repeat from *.

Cross Treble Stitch (also called K stitch) : Ch for desired length, thread over twice, insert in 5th st from hook, * work off 2 Ips, thread over, sk 2 sts, insert in next st and work off all Ips on needle two at a
time, ch 2, dc in center of st to complete cross. Thread over twice, insert in next st, and repeat from *.

Double Treble-Thread over hook three times, insert hook in sixth st from hook, work off 2 lps at a time, as you did for a tr, until st is completed. Ch 5 to turn for next row.

Triple Treble– Thread over hook 4 times, work off 2 lps at a time
same as for a tr. Ch 6 to turn for next row.

To Increase-Work 2 sts in one st.
To Decrease – Draw up a lp through each of the next 2 sts, thread over and draw through 3 Ips to make one sc. For a dc dec, dc in each of 2 sts, retaining last Ip of each dc on hook (3 Ips on hook), thread
over and pull through all 3 lps at once. Fancy Crochet Stitches
Picot: * Ch 5, sI st back into the first ch at beginning of ch 5, sc in each of next 3 sts across, repeat from *.

Cluster Stitch: A cluster st is a group of 3 or 4 sts-dc, tr, etc.. worked off together to form a petal-shaped stitch. Dc (tr or any other st specified) in st, hold last lp on hook, dc in each of next 2 sts, holding
last Ip of each dc on hook-4 lps on hook, thread over and pull through all Ips at once.