For ся, what do the perfect aspect and the imperfect aspect mean in Russian?

In fact, you just don't understand the meaning of the-ся verb, do you? So I will tell you according to the textbook.

This expression has four meanings. The first is the reflexive meaning, that is, what you are doing instead of doing for others. This is different from not taking verb-ся, which is easy to understand. The second is mutual meaning, such as the most common meeting, discussion and association. If the subject of this sentence is singular, it likes to be associated with счем. The third is passive meaning, such as construction, research and inspection. The object of the action is the subject, which is different from the verb without-ся. For example, the subject of verb-ся is the repaired building, so the worker will use the fifth one like this; Without verb-ся, the main body is workers. The fourth kind is relatively simple, which is the meaning of the word itself. When expressing this meaning, the above three functions do not exist. The verb with-ся is only a transitive or uncompromising meaning, such as beginning, ending and continuing. , as well as the state, position and motion changes of the object.

Understand?