Breakdown of kono hotchikisu wa chiisai desu ga, kopiiyoushi o juumai matomeraremasu.
Questions & Answers about kono hotchikisu wa chiisai desu ga, kopiiyoushi o juumai matomeraremasu.
は marks the topic of the sentence.
So このホッチキスは means something like:
- As for this stapler, ...
- This stapler, ...
The speaker is introducing this stapler as the thing they are going to comment on.
If you used が instead, it would sound more like you are specifically identifying this stapler as the one with that property, rather than simply talking about it as the topic.
小さい is an い-adjective, so it does not take だ.
- Correct: 小さいです
- Incorrect: 小さいだ
With い-adjectives, the adjective itself already functions as the predicate, and です is added only to make it polite.
So:
- 小さい = is small
- 小さいです = is small (polite)
This is different from な-adjectives and nouns, which do use だ / です:
- 静かだ / 静かです
- 先生だ / 先生です
