 Hello. As you know, in theoretical linguistics, the term grammar refers to a coherent system of rules and principles which determines the formation of the sentences of a language. Such a system is a generative grammar whose fundamental ideas constitute the focus of this unit. In the virtual session we will look at the notion of the well-formed sentence and we will see how a generative grammar produces well-formed sentences and rejects ill-formed sentences. As usual, if you don't know where to start, use the question sheet and the hyperlinks and video links in it to be guided through the virtual session. The mastery worksheet is a dynamic multiple choice test which, after the virtual session, shouldn't be problematic at all. And the practical, another one typical for syntax, uses sentences of all types to test your intuitions and your syntactic creativity. The whole unit is fairly complex but provided that you make use of all its components, you should manage.