忙しい · i-adjective
| Form | Positive | Negative |
|---|---|---|
| Dictionary | 忙しい | 忙しくない |
| Polite | 忙しいです | 忙しくないですalso 忙しくありません |
| Past polite | 忙しかったです | 忙しくなかったですalso 忙しくありませんでした |
| Past | 忙しかった | 忙しくなかった |
| Te-form | 忙しくて | 忙しくなくて |
| Adverbial | 忙しく | |
| Conditional | 忙しければ | 忙しくなければ |
| Tara conditional | 忙しかったら | 忙しくなかったら |
The main everyday sense: a person, schedule, workplace, season, etc. has many things to do and little free time.
I'm busy with work today.
年末はどの店も忙しくなる。
Every shop gets busy at the end of the year.
Describes movement, attention, or manner that is constantly shifting or hurried. Less central than the 'busy with work' sense, and often used adverbially as 忙しく.
小鳥が枝から枝へ忙しく飛び回っている。
The little birds are flitting restlessly from branch to branch.
彼は話しながら視線が忙しかった。
As he talked, his eyes kept darting around.
I'm busy with work.
I've been keeping busy every day.
This week I'm so busy my head is spinning.
The end of the year is the busiest time.
Despite being busy, he made time for me.
The child is moving around restlessly.
忙しい is the everyday i-adjective for being busy, while 多用 is a stiffer, more formal noun/na-adjective used in polite correspondence.
忙しい describes a person or period as busy in general, while 立て込む focuses on tasks, appointments, or customers accumulating at once.
忙しい is the plain adjective for being busy, whereas 取り込む (intransitive) suggests a hectic, disordered kind of busyness caused by unexpected trouble.