ごはんをたべます。
- I eat rice.

ごはんをたべます。 meaning: I eat rice. / I will eat rice.

The basic sentence structure in Japanese is Subject-Object-Verb (SOV). However, the subject is often omitted if it's clear from the context. In the example ごはんをたべます。, the subject ("I" or "私 - watashi") is omitted. ⚫︎ The sentence is composed of the object ごはん - gohan (rice), the particle を - o, and the verb たべます - tabemasu (eat, in polite form).

を - o is a particle that marks the direct object of a verb. It indicates what the verb is acting upon. ⚫︎ In this sentence, ごはん - gohan (rice) is the direct object of the verb たべます - tabemasu (eat). Therefore, を - o is placed after ごはん - gohan. ⚫︎ Another example: りんごをたべます - Ringo o tabemasu (I eat an apple.)

The verb たべます - tabemasu is in the "masu" form, which is the polite form of verbs in Japanese. It's used in everyday conversation and when speaking to people you don't know well or who are older than you. ⚫︎ The base form of the verb "to eat" is 食べる - taberu. ⚫︎ To make it "masu" form, we remove the final る - ru and add ます - masu. ⚫︎ たべます - tabemasu can express both present and future tense (I eat/will eat). The context will clarify the intended meaning. ⚫︎ Another example: のみます - nomimasu (I drink/will drink).

The object is the thing that is being acted upon by the verb. ⚫︎ In this case, ごはん - gohan (rice) is the object, and it is being eaten. ⚫︎ Identifying the object helps to understand the meaning of the sentence. ⚫︎ To find the object, we can ask "what?" or "whom?" to the verb. ⚫︎ Another example: 本を読みます - Hon o yomimasu (I read a book). The object is 本 - hon (book).

This grammar is slightly beyond the scope of this particular sentence, but a very helpful expression. ⚫︎ を - o can be used with a noun to describe an action. を - o marks the object and します - shimasu is a common verb meaning "to do". ⚫︎ For instance, 勉強をします - benkyou o shimasu (I study/will study). 勉強 - benkyou (study) becomes the object, and します - shimasu makes the phrase a sentence describing an action.