The difference between metonymy and metonymy is: there is a real relationship between the ontology of metonymy and the borrowed object. Generally speaking, this relationship is quite close; metonymy means that there is generation in the metaphor, while metonymy is generation without Metaphor; metonymy focuses on similarity, while metonymy focuses on correlation; metonymy can be changed into a simile (that is, it can be changed into a form of... like...), but metonymy cannot. For example, there are a group of red scarves in the playground, and the red scarves are metonymy. ⑴The essence of metonymy is "metaphor". Although its ontology and metaphor do not appear, it implies a comparable object (i.e. ontology). The essence of metonymy is "generation", which uses certain characteristics of things to refer to the ontology, and has no comparable object.
⑵ Because metaphor is a "metaphor", it can generally be supplemented with "ontology" and "metaphor". Borrowing has no comparable object and cannot be supplemented in this way.
⑶ Metaphors can generally describe an entity that does not appear. However, metonymy can only play the role of "generation". Most of its substitute words are nouns or noun phrases and cannot play a descriptive role.
⑷In an article, if the metaphor "×× is like ××" appears in the front, and the metaphor is used directly in the following text, it becomes metonymy