Such as: student library, books and books.
The students are reading in the library.
2. Use the properties of other verbs to express the purpose or object of temporary automatic words.
For example, the club will be closed in the week of illness.
I was ill for a week.
3. Indicates where the action moves or passes, and the verb after を is a moving verb.
Such as: summer vacation, trip to Kyushu, Hokkaido. ?
During the summer vacation, I traveled to Hokkaido and Kyushu.
4. Indicate the elapsed time or time point.
Such as: そこでをごし123833 years. ?
Three years passed like this.
5. Mark the starting point.
Such as: 8 o'clock in private, 8 o'clock at home and 8 o'clock at school.
I go out from home at eight o'clock every day and go to school.
Extended data:
Characteristics of Japanese auxiliary words;
1. auxiliary word is an auxiliary word without flexible usage (suffix change). They can't form a single section, but can be combined with other phrases.
2. Auxiliary words cannot express any meaning alone, but follow other words to indicate the position of the word in the sentence, or to indicate the relationship between the word and other words, or to add some meaning to the word.
3. What words should be followed by each auxiliary word, or which flexible form has flexible words, there are certain rules. This connection rule is called auxiliary word connection.
4. An auxiliary word often specifies the scope or tendency of the following words, which is called the follow-up of auxiliary words.
5. When auxiliary words overlap with each other, there are certain rules.
Baidu Encyclopedia-Japanese Auxiliary Words