zhèlǐ yǒu mógu.

This is a very common Mandarin pattern:

place + 有 + thing

So:

• 这里有蘑菇。 = There are mushrooms here.

In English, we often start with there is/there are, but in Chinese, it is very natural to start with the location first.

Other examples:

• 桌子上有一本书。 = There is a book on the table.
• 学校里有很多学生。 = There are many students in the school.

So 这里 sets the location, and 有 introduces what exists there.

Here, 有 means there is / there are / to exist in a place.

Many learners first meet 有 as to have:

• 我有一本书。 = I have a book.

But 有 is also used for existence:

• 这里有蘑菇。 = There are mushrooms here.

So the core idea of 有 is something like to have / to contain / for there to be. The exact English translation depends on the sentence.

Mandarin does not need a dummy subject like English there.

English says:

• There is a mushroom here.

But Mandarin simply says:

• 这里有蘑菇。

Chinese usually expresses this idea directly with location + 有 + noun. There is no extra word corresponding to English there in this kind of sentence.

Because 是 is not used to show existence in a place.

• 是 is mainly used to connect one noun to another, like A is B.
• 有 is used to say that something exists somewhere.

So:

• 这里有蘑菇。 = There are mushrooms here. ✔
• 这里是蘑菇。 = This sounds wrong for that meaning. ✘

Use 有 when you want to say something is present in a location.

It can be either singular or plural, depending on context.

Chinese nouns usually do not change form for singular vs. plural the way English nouns do. So 蘑菇 can mean:

• a mushroom
• mushrooms

If you want to be more specific, you can add a number and a measure word:

• 这里有一个蘑菇。 = There is one mushroom here.
• 这里有一些蘑菇。 = There are some mushrooms here.
• 这里有很多蘑菇。 = There are many mushrooms here.

Without that extra information, 蘑菇 is just neutral about number.

Not in this sentence.

When Chinese uses a bare noun after 有 in an existence sentence, a measure word is often not necessary:

• 这里有蘑菇。 = There are mushrooms here.

But if you add a number or words like one, then you usually need a measure word:

• 这里有一个蘑菇。

A common measure word for mushrooms is 个 in everyday speech, though more specific measure words may exist in special contexts.

So:

• 有蘑菇 = fine
• 有一个蘑菇 = fine
• 有一蘑菇 = not correct

Yes. 这儿 and 这里 both mean here.

So these both work:

• 这里有蘑菇。
• 这儿有蘑菇。

In everyday speech, 这儿 is very common in northern Mandarin and in casual conversation. 这里 may sound slightly more neutral or standard in many learning materials.

Both are perfectly natural.

They are related, but not exactly the same.

这里有蘑菇

This is an existence sentence:

• There are mushrooms here.
• It introduces the presence of mushrooms in this place.

蘑菇在这里

This is a location sentence:

• The mushrooms are here.
• It sounds more like the mushrooms are already known, and now you are saying where they are.

So:

• 这里有蘑菇。 = There exist mushrooms here.
• 蘑菇在这里。 = The mushrooms are here.

This is a very useful contrast in Chinese:

• place + 有 + noun → existence
• noun + 在 + place → location

这里 is written zhèlǐ.

A few pronunciation notes:

• 这 is fourth tone: zhè
• 里 is often taught as third tone: lǐ

So in careful pronunciation:

• zhè lǐ

In natural speech, the second syllable may sometimes sound lighter, closer to zhèli, but learners can safely say zhèlǐ.

Also remember:

• zh is not like English z
• ü is not used here; it is just li

It is pronounced mógu.

Notes:

• 蘑 = second tone: mó
• 菇 is often pronounced with a neutral tone in everyday speech: gu

So it usually sounds like:

• mógu

That neutral second syllable is very common in everyday vocabulary, so do not over-stress 菇.

Yes.

这里 literally means something like this place / here. In many sentences, English will simply translate it as here.

For example:

• 这里很安静。 = It’s quiet here.
• 这里有蘑菇。 = There are mushrooms here.

So 这里 is a place word, and English may translate it in different ways depending on what sounds natural.

有蘑菇这里 is not correct.

The normal structure is:

• 这里有蘑菇。

You may also hear longer patterns like:

• 这里有蘑菇吗？ = Are there mushrooms here?

As for 有蘑菇在这里, it is usually less natural than 这里有蘑菇 for simple existence. Chinese strongly prefers putting the location first in this pattern.

So the best basic sentence is:

• 这里有蘑菇。

It is completely natural on its own.

It could be used in situations like:

• pointing at a forest floor
• warning someone while hiking
• noticing food ingredients
• identifying what is growing in an area

Depending on tone and context, it might sound like:

• a simple observation
• a warning
• useful information

So even though it is short, it works well as a full sentence.

A very common way is to add 吗:

• 这里有蘑菇吗？ = Are there mushrooms here?

You could also ask more specifically:

• 这里有没有蘑菇？ = Are there mushrooms here or not?

Both are common. The 有没有 pattern is especially useful in spoken Chinese because it directly asks whether something exists.

Use 没有:

• 这里没有蘑菇。

This is the negative form of the existence pattern:

• 这里有蘑菇。 = There are mushrooms here.
• 这里没有蘑菇。 = There are no mushrooms here.

For existence and possession, 有 is usually negated with 没有, not 不有.