As shown in the Summary section, this chapter will be organized into two sub-chapters (The etymology of the ~ing form and respectively, The multiple uses of the -ing form) under the generic title of THE DIACRONIC APPROACH TO -ING.We propose to begin with a diachronic approach to the -ing form, starting with Old English through to Modern English. We believe that only a historical analysis of the -ing phenomenon allows us to understand its multiple uses and flexibility. Therefore, we continue by listing the English forms – ing. In this chapter, we propose to bring together significant data on the origins and development of the -ing phenomenon. -ing, which will be very useful in developing and supporting the objective of this document.1.1. The etymology of the form ~ing Before approaching the subject, a distinction between the main approaches to the study of English, that is, the diachronic and synchronic approach, is necessary. This terminology belongs to the linguist Ferdinand de Saussure, who stressed the importance of considering the evolution of a language from two distinct points of view, which he described as "diachronic and synchronic". Synchronic linguistics considers language as a living whole, existing at a given time, while diachronic linguistics is interested in language and its historical development. Thus, a synchronic approach refers to the study of a language in a particular period of time, while the diachronic approach is a historical study of language development. According to A. Poruciuc (2004), in recent decades English has been studied mainly in the form of a synchronic-structuralist position, which can be considered the most suitable for practical and didactic purposes...... middle of the article ......ll will appear as, ande/-ende. But, during the 14th century, these forms were abandoned in favor of –ynge /-inge, obviously, by analogy with the verbal nouns inherited from the OE form. TC comeng, pouryng have nominal functions; but willenge, tkenge are clearly verbal-participial. In the MnE period, the continuous (progressive) aspect was still uncertain, and even considered "vulgar" for scholarly prescribers of SMnE. It was not accepted as part of English grammar until the 19th century, when more and more writers used it in their works. The conversion process has become a simple and dynamic process of creating new words, as well, by simply changing the order of words, as well as by specific endings (-s, -ing, ed), nouns and adjectives can become verbs and verb forms. can be substativized – this is the process in which the –ing suffix thrives.1.1.2 The multiple uses of the ~ing form