I am not a teacher nor good teaching someone, you need a lot of patient for your student. Some children easily learn how to read and some are not. For some children that does not learn easily it may take a while and you have to spend a lot of patient.
You may start teaching them to recognized the sounds; like a e i o u and use every letter and words with it. Give an example with all the vowels and phonetic words. Then you can start with sentence and then proceed to Paragraphs. You may ask your student to repeat after you and then let her read the whole paragraphs. Then, if your student can do this activities, praise her and you can do it repeatedly. Just reminder that children may sometimes find it not interested but hang on, it will take for a little while. You may used a book of an interesting stories so your student having fun reading too.