うさぎは馬より小さいです。
- A rabbit is smaller than a horse.

うさぎは馬より小さいです。 meaning: The rabbit is smaller than the horse.

The basic sentence structure in Japanese is Subject-Object-Verb (SOV), although it can sometimes be flexible. This sentence uses a Subject-Topic-Predicate structure, which is very common. ⚫︎ The topic is introduced first, indicated by the topic particle は (wa). ⚫︎ The subject is then often implied or mentioned before the topic. ⚫︎ The predicate (the part that says something about the topic) comes last. In this sentence, the predicate is the adjective 小さいです (chiisai desu - is small). ⚫︎ The particle より (yori) means "than" and indicates the comparison.

The particle は (wa) marks the topic of the sentence. The topic is what the sentence is about. ⚫︎ うさぎ (usagi - rabbit) is the topic of the sentence. ⚫︎ は (wa) indicates that the speaker is talking *about* the rabbit. ⚫︎ The topic is usually placed at the beginning of the sentence. ⚫︎ Often, the topic is also the subject, but not always.

The particle より (yori) is used in comparisons to indicate "than". ⚫︎ It is placed after the item being compared *to*. ⚫︎ In this sentence, 馬 (uma - horse) is the item being compared to. ⚫︎ The sentence structure is "A は (wa) B より (yori) (adjective/verb)." meaning "A is [adjective/verb] than B."

小さい (chiisai - small) is an い-adjective. い-adjectives conjugate based on their ending い (i). ⚫︎ The polite form, です (desu) is added to the adjective stem (the part before the い). ⚫︎ 小さい (chiisai) becomes 小さいです (chiisai desu - is small/small polite form). ⚫︎ Other conjugations include present affirmative, present negative, past affirmative and past negative. ⚫︎ Other examples include 高い(takai - high, expensive), 暑い(atsui - hot), and 面白い(omoshiroi - interesting).

This sentence contains important vocabulary words and their roles within the sentence. ⚫︎ うさぎ (usagi): This is the subject of the sentence, the rabbit. ⚫︎ 馬 (uma): This is used in the comparison, representing the horse. ⚫︎ 小さい (chiisai): This is an adjective that describes the size of the rabbit. ⚫︎ です (desu): This is a polite copula, that means "is" or "are". It creates a polite form of the adjective. ⚫︎ より (yori): This particle is essential for comparison and means "than". ⚫︎ は(wa): Topic Marker.