seito ga robotto wo tamesita.

Japanese usually puts the verb at the end of the sentence.

So this sentence follows the common pattern:

• 生徒 = student
• が = marks the subject
• ロボット = robot
• を = marks the direct object
• 試した = tested / tried

So the structure is:

subject + object + verb

That is very normal in Japanese.

They are particles, and they show the role of each noun in the sentence.

• が marks the subject: the one doing the action
• を marks the direct object: the thing receiving the action

So here:

• 生徒が = the student is the one doing the testing
• ロボットを = the robot is what is being tested

Without these particles, it would be much harder to tell who did what.

Both が and は can come after a noun, but they do different things.

• が tends to identify or focus on the subject
• は marks the topic, often with a sense of as for...

In a simple sentence like this, 生徒がロボットを試した sounds like:

• The student tested the robot
• or It was the student who tested the robot

If you changed it to 生徒はロボットを試した, it would sound more like:

• As for the student, they tested the robot

That version may feel more contrastive or topical depending on context.

試した is the plain past affirmative form of the verb 試す.

• dictionary form: 試す = to try / to test
• past plain form: 試した = tried / tested

So this sentence describes a completed action in the past.

It can mean either, depending on context.

Common meanings of 試す include:

• to test
• to try out
• to attempt experimentally

With ロボット, tested the robot is a very natural translation.
It could also be understood as tried out the robot in some contexts.

So the exact English wording may vary, even though the Japanese is the same.

It can be either. Japanese nouns usually do not change form for singular vs. plural.

So 生徒 can mean:

• student
• students

In this sentence, the translation might show the student tested the robot or the students tested the robot, depending on context.

If the sentence is presented with a singular meaning, that comes from context, not from the noun form itself.

Japanese does not have articles like English a, an, and the.

So 生徒 could mean:

• a student
• the student
• sometimes just student(s) in a general sense

And ロボット could mean:

• a robot
• the robot

Which one sounds best in English depends on context.

It is read:

せいと が ろぼっと を ためした。

More specifically:

• 生徒 = せいと
• が = が
• ロボット = ロボット
• を = written を, pronounced お
• 試した = ためした

A natural full reading is:

せいと が ろぼっと を ためした。

The particle を is a special case in modern Japanese.

• It is written with the kana を
• but in normal modern pronunciation, it is usually pronounced お

So:

• ロボットを sounds like ろぼっとお

In careful explanation, people still call it the object marker を, but when speaking, it is basically pronounced お.

Both can be translated as student, but they are used differently.

• 生徒 usually means a pupil or student in school, especially below university level
• 学生 usually means a student more generally, and very often a university student

So 生徒 suggests a school student rather than a college student.

It is a loanword written in katakana.

• ロボット comes from robot
• Katakana is commonly used for foreign loanwords

So this word is not native Japanese vocabulary, but it is a standard Japanese word now.

The spaces are usually added for learners.

Normal Japanese writing does not usually put spaces between words, so this sentence would normally appear as:

生徒がロボットを試した。

Because Japanese uses kanji, hiragana, and katakana together, readers can usually tell where words begin and end without spaces.

Yes. Depending on context, natural translations could include:

• The student tested the robot.
• A student tested the robot.
• The student tried the robot.
• The student tried out the robot.

Japanese often leaves things like articles and number unstated, so multiple English translations can be correct.

It is in the plain style, not the polite style.

• plain past: 試した
• polite past: 試しました

So a polite version would be:

生徒がロボットを試しました。

The plain form is very common in casual speech, stories, and dictionary-style examples.