The almost forty dramatic works and several poems of Shakespeare give testimony of more than twenty years of intensive literary activity. Following the edition of 1623, the first can be divided into historical dramas, comedies, and tragedies. Nevertheless, this classification and other posterior ones are not satisfactory, because not all that were are included (and vice versa) and hide the fact that Shakespeare's work were not normally pure genres. The conference will address the production of Shakespeare as a work in continuous evolution and experimentation, focusing especially in four dramatic pieces that illustrate this characteristic, and in which it is possible to see his frequent mixture of genres. Also, and although briefly, we will speak of Shakespeare's poetry, and especially his sonnets as a key part of the whole of his work.