 Hello. This unit studies the role of the lexicon in generative grammar. It shows how lexical aspects help to solve various problems with ungrammatical or strange sentences. In the virtual session, which exhibits two e-lectures and several micro-teaching videos, we will show how the lexicon interacts with the phrase structure component and will discuss the aspects that are necessary to define the legitimacy of lexical insertion. If you don't know where to start, use the question sheet with the hyperlinks in it to be guided through the virtual session. The mastery worksheet is an identification task where you have to insert the appropriate verbs into local syntactic trees. It shouldn't be problematic after the virtual session and of course by means of applying your knowledge about phrase structure. The practical, another one typical for syntax, provides you with data with words and sentences that need to be specified in detail before they can undergo lexical insertion. The whole unit is fairly complex but provided that you make use of all its components and with your knowledge about generative grammar at hand, you should manage.