This one is the golden rule to teach your 4 years old to write. While you practice writing each day, include a loose sheet each day. For example, one A4 size paper that you will give your child to write. Include a place to write her name and date/day in each sheet.
Name: _________________________________
Date: __________________________________
In this way, they will practice writing their name each day. Take one day at a time and don’t force your child on this. At first, they will need your help. So, write her name on a paper and offer it to your child to copy the same. As you practice this for 6 months at a stretch, you will notice, on the 7th month, your child can efficiently write his or her name.
Remember consistency will show you good results.