Chain (CH): Place your yarn around the hook and pull through the loop – repeat till you have the number of chains required.
Turning chain: A turning chain is used to replace any stitch at the beginning of a new round and is made the same way as a regular chain. It consists of a number of loops depending on the height of the stitches used:
Single crochet – 1 loop
Halfdouble crochet – 2 loops
Double crochet – 3 loops
Treble crochet – 4 loops
Double treble crochet – 5 loops