wǒ bù mǎi rènhé làjiāo.

不 is used to negate buying as a general action, habit, choice, or future intention.

• 我不买任何辣椒。 = I do not buy any chili peppers / I won’t buy any chili peppers.
• 我没买任何辣椒。 = I did not buy any chili peppers.

A simple way to remember it:

• 不 = not, generally or habitually
• 没 = did not, or have not

So if you are talking about something you usually do not do, or something you are refusing to do now, 不 is the right choice.

任何 means any in the sense of any at all.

In this sentence, 任何辣椒 means any chili peppers whatsoever. It strengthens the negation.

So:

• 我不买辣椒。 = I don’t buy chili peppers.
• 我不买任何辣椒。 = I don’t buy any chili peppers at all.

A very important point: 任何 is most commonly used in negative sentences, questions, and some conditional sentences.

Examples:

• 我没有任何问题。 = I don’t have any questions.
• 你有任何问题吗？ = Do you have any questions?
• 如果有任何问题，请告诉我。 = If there are any problems, please tell me.

Yes, absolutely.

我不买辣椒 is simpler and very natural. It means I don’t buy chili peppers.

Adding 任何 makes the sentence stronger or more emphatic:

• 我不买辣椒。 = I don’t buy chili peppers.
• 我不买任何辣椒。 = I don’t buy any chili peppers at all.

In everyday speech, people often omit 任何 unless they want to sound more definite, formal, or emphatic.

In Chinese, 任何 goes before the noun it modifies.

So:

• 任何 + noun
• 任何辣椒 = any chili peppers
• 任何问题 = any problem
• 任何人 = anyone / any person

You cannot put 任何 after 辣椒.

The structure of the whole sentence is:

• 我 = subject
• 不买 = verb phrase
• 任何辣椒 = object

So the sentence order is very straightforward: Subject + negative + verb + object

Because 辣椒 here is being used as a general noun, not as a counted item.

Chinese often uses nouns without measure words when speaking about something in a general or uncounted way.

So:

• 我不买任何辣椒。 = I don’t buy any chili peppers.

But if you want to count them, you would normally add a measure word:

• 我不买任何一个辣椒。 = I won’t buy even a single chili pepper.
• 我不买任何一斤辣椒。 = I won’t buy any amount of chili peppers measured by the jin.

In this sentence, the speaker is talking about chili peppers in general, so no measure word is needed.

Usually 辣椒 means chili pepper or hot pepper, not just any pepper.

It refers to peppers with heat or spice. It does not usually mean black pepper, and it does not always mean sweet bell peppers.

Some useful comparisons:

• 辣椒 = chili pepper / hot pepper
• 青椒 = green pepper, often bell pepper
• 甜椒 = sweet pepper
• 胡椒 = pepper as a spice, such as black pepper

So in this sentence, 辣椒 is most naturally understood as chili peppers.

Chinese verbs do not change form for tense the way English verbs do. 买 can be understood from context.

So 我不买任何辣椒。 could mean:

• I don’t buy any chili peppers.
• I am not buying any chili peppers.
• I won’t buy any chili peppers.

The exact time depends on the situation.

If you want to make the time clearer, you can add time words:

• 我今天不买任何辣椒。 = I’m not buying any chili peppers today.
• 我昨天没买任何辣椒。 = I didn’t buy any chili peppers yesterday.
• 我以后不买任何辣椒。 = I won’t buy any chili peppers in the future.

Here, 不 is pronounced bù, with fourth tone, because the next syllable 买 mǎi is third tone.

A useful pronunciation rule:

• 不 usually becomes bú before another fourth-tone syllable.
• Otherwise, it stays bù.

Examples:

• 不买 = bù mǎi
• 不是 = bú shì

So in this sentence, the pronunciation bù mǎi is correct.

Yes, it is grammatical and understandable, but it can sound a little more formal or emphatic because of 任何.

In casual everyday speech, people are often more likely to say:

• 我不买辣椒。
• 我不要买辣椒。 if they are rejecting the idea in conversation
• 我没买辣椒。 if talking about a past purchase

So 我不买任何辣椒。 is fine, but it has a stronger not any at all feeling than the simpler version.

Yes. Even though 辣椒 is a singular-looking noun in English translation, Chinese nouns usually do not mark singular vs. plural.

So 辣椒 can mean:

• chili pepper
• chili peppers
• chili as a category

In this sentence, 任何辣椒 is understood broadly as any chili peppers.

Chinese relies on context rather than changing the noun form the way English does with pepper vs. peppers.