Thanks Yorkylass but what I mean is that as you type, options for each of the words appears on the screen before you have finished typing it.
Not sure if that is any clearer!
I don't know any other way than the way I described sorry. If you input the words or regularly used string of words for that matter, when you start to type the word the option to input it appears and you just press enter.
It is like the predictive text on a mobile you just have to give it some words or phrases to have in it's memory to be able to do it.