yǔqí qǔxiāo sījiàokè, bùrú míngtiān zài shàng.

与其……不如…… is a common pattern meaning rather than A, it would be better to do B.

In this sentence:

• 与其取消私教课 = rather than cancel the private lesson
• 不如明天再上 = it would be better to take it tomorrow instead

So the structure compares two options and recommends the second one.

A simple formula is:

与其 + option A, 不如 + option B

It often sounds a little more formal or deliberate than just saying 还是……吧.

Yes. 与其 by itself introduces the first option in a comparison, but it normally expects a matching 不如 later.

So:

• 与其 A，不如 B = rather than A, better to B

You usually do not use 与其 alone in this kind of sentence. It works as part of a pair.

Also, in modern Mandarin, learners should mainly think of 与其 as a fixed grammar item, not as something to translate word-by-word.

Chinese often leaves out the subject when it is already clear from context.

So this sentence does not explicitly say:

• 你 should cancel / take the class tomorrow
• 我们 should cancel / take the class tomorrow

That is normal. The subject is understood from the situation.

In English, we usually need a subject, but in Chinese it is often omitted if it would be obvious.

私教课 means a private lesson or private tutoring session.

It can be broken down like this:

• 私 = private
• 教 = teach / instruction
• 课 = class / lesson

So 私教课 is a class taught privately, usually one-on-one.

Depending on context, it could mean:

• a private language lesson
• a private fitness session
• a private music lesson

The exact type of lesson depends on the situation.

Yes, 上 has many meanings, and one very common one is to attend / take a class.

So in the context of lessons:

• 上课 = to attend class
• 上中文课 = to take a Chinese class
• 上私教课 = to take a private lesson

In this sentence, 上 means attend or take the lesson.

This is a very important usage to remember, because it is extremely common in Chinese.

Here, 再 means something like then, later, or again at a later time.

In 明天再上, it suggests:

• do it tomorrow instead
• take the class later, tomorrow

This is different from 又, which usually refers to something happening again in a way that is already realized or repeated.

A useful learner rule is:

• 再 → again/later, often for future actions
• 又 → again, often for repeated or already happened actions

Since the class would happen tomorrow, 再 is the natural choice.

Because the object is already clear from the first half of the sentence.

The sentence already mentioned 私教课, so in the second half Chinese can leave it out:

• 与其取消私教课，不如明天再上。

This is very natural. Chinese often omits repeated information when it is obvious.

If you wanted to say it more fully, you could say:

• 与其取消私教课，不如明天再上这节课。
• 与其取消私教课，不如明天再上私教课。

But the shorter version is smoother and more natural in conversation.

Chinese word order usually puts time words before the verb.

So:

• 明天 = tomorrow
• 再 = then/again/later
• 上 = attend/take

That gives:

• 明天再上 = take it tomorrow instead

A common order is:

Time + adverb + verb

For example:

• 明天再说 = let’s talk about it tomorrow
• 下周再去 = go next week instead
• 以后再学 = study it later

So 明天再上 follows a very normal Chinese pattern.

取消 is natural if you mean cancel the lesson.

But depending on the situation, other verbs may also be possible:

• 取消 = cancel
• 改到明天 = move/reschedule it to tomorrow
• 改期 = reschedule
• 不上了 = not attend it anymore / not go to it

The nuance is slightly different:

• 取消私教课 suggests the lesson is being canceled
• 明天再上 suggests postponing it rather than canceling it completely

So the sentence is basically recommending postponement instead of cancellation.

Because 私教课 is treated as a compound noun, not as a full modifier phrase.

Chinese often combines nouns directly without 的 when the relationship is close and lexicalized.

So:

• 私教课 = private lesson
• 中文课 = Chinese class
• 数学课 = math class

If you used 的, it would usually sound less like a fixed class name and more like a descriptive phrase. In this case, 私教课 without 的 is the standard and natural form.

Yes, that is a very good natural translation.

Other possible translations include:

• Rather than cancel the private lesson, it’d be better to do it tomorrow.
• Instead of canceling the private lesson, better to take it tomorrow.
• Rather than cancel the private lesson, why not have it tomorrow instead?

The exact English wording can vary, but the Chinese structure clearly prefers rescheduling over canceling.

It is mostly neutral, with a slightly thoughtful or deliberate tone because of 与其……不如…….

Compared with other ways to say something similar:

• 与其……不如…… = a bit more structured and analytical
• 还是明天再上吧 = more casual and conversational
• 别取消了，明天再上吧 = very natural spoken suggestion

So the sentence is not overly formal, but it is a little more polished than everyday casual speech.