Part 1 is categorized by language functions such as "making requests", "giving advice", "making suggestions and invitations" and so on. Each chapter contains dialogues, example sentences and explanations.
Part 2 is categorized by the various daily scenes such as "at the bank", "At the restaurant" and "At the railway station".
There are a large number of necessary words and practical examples for each scene listed in each chapter.
Part 3, in this section, grammatical points in Part 1 and 2 are explained in more detail in order to develop further understanding.
This section aims to improve your ability in applying new skills by classifying and explaining each grammatical point.