Learning polylexical units is a real challenge in the development of an additional language (Lx). However, communicative competence in oral communication is largely based on knowledge and use of these units. It is therefore essential to include them in the teaching of oral communication. The aim of this article is to bridge the gap between research and the teaching of these polylexical units, referred to here as prefabricated sequences (PS). In the article, we shall describe the functions of PSs in oral communication. Next, we will describe the process of learning SPs in an Lx and review some studies that propose methods to facilitate their learning. Finally, drawing on previous research, we will propose pedagogical activities likely to inspire and support teachers in incorporating SPs into the teaching of oral communication in Lx French.