This is an important verb pair:
In this sentence, the surgery itself is the thing that begins, so Japanese uses 始まる:
If you used 始めます, it would imply that someone starts something:
So 始まります is correct because the sentence focuses on the surgery beginning.
Time words like 今日, 明日, 昨日, 毎日, and similar expressions often do not take に.
So:
This is completely normal Japanese.
You might see に with specific points in time, such as:
But with relative time words like 明日, に is usually not used.
Grammatically, 始まります is a non-past form. Japanese does not have a separate future tense the way English does.
That means 始まります can mean:
In this sentence, because of 明日, the meaning is clearly future:
So even though the verb form is not a special future tense, the time word makes the meaning future.
Yes, 手術が明日始まります is possible, but the nuance changes.
In many everyday situations, は sounds natural if the surgery is already the topic of conversation.
が can sound a bit more like presenting new information or emphasizing what it is that starts.
For a learner, the original sentence with は is very natural and common.
The sentence is:
So the structure is roughly:
Topic + time + verb
A very literal breakdown would be:
Japanese often puts the verb at the end, which is one of the biggest differences from English.
Yes. 始まります is the polite ます-form of 始まる.
So this sentence is polite and appropriate in many normal situations, such as:
A plain-form version would be:
That version is less polite and would be used in casual speech or informal writing.
Correct: normal Japanese writing usually does not use spaces.
So the sentence would normally be written as:
手術は明日始まります。
Learning materials often insert spaces to help beginners see the parts more clearly:
Those spaces are just for study purposes.
Yes, Japanese word order is fairly flexible as long as the particles make the relationships clear and the verb stays near the end.
For example:
Both are natural, though the emphasis can feel slightly different.
The original sentence is very standard and easy to understand.
Here are the readings:
So the full reading is:
しゅじゅつはあしたはじまります。
It can mean either surgery or an operation in English.
In medical contexts, 手術 is the standard word for a surgical procedure. Depending on the translation, you might see:
Both are fine. Surgery is often the more natural choice in everyday English, while operation can sound a little more formal or medical depending on context.