I don't have enough money to buy a bike.

[keannu]

Can you replace enough with "much"? My grammar books only has the answer "enough", but I think much is also possible.

ex)I don't have enough money to buy a bike.

[Gillnetter]

Can you replace enough with "much"? My grammar books only has the answer "enough", but I think much is also possible.

ex)I don't have enough money to buy a bike.

No. Enough means sufficient. Much means more than a little. Your sentence would read like this, "I don't have much money to buy a bike."
You could write, "I don't have much money, not enough to buy a bike."

[Michael84]

Can you replace enough with "much"? My grammar books only has the answer "enough", but I think much is also possible.

ex)I don't have enough money to buy a bike.

not a teacher

Not without minor changes to the structure.

I don't have much money; therefore, I can't buy (/afford) a bike.

[keannu]

No. Enough means sufficient. Much means more than a little. Your sentence would read like this, "I don't have much money to buy a bike."
You could write, "I don't have much money, not enough to buy a bike."

It seems much just means "more" that's not comparable to the price of the bike, but it's still confusing, I don't get it perfectly. I'm sorry!

[Gillnetter]

It seems much just means "more" that's not comparable to the price of the bike, but it's still confusing, I don't get it perfectly. I'm sorry!

I don't have enough money to buy a bike.

No. Try this, "How much money do you have?"

This sentence isn't about if you have more money than needed, it merely asks how much - what is the amount.

"How much does she love you? Oh, about this much." Again, this sentence is not about more, it is about the amount of love.

"I wish that I had much more." This sentence talks about someone wanting more than they have now - back to amount.

[keannu]

Much refers to the amount of money that one has or doesn't have, and is non-specific. (meaning it doesn't state how much money the person acutally has / $30, $50, $100, $1000 etc).

Whereas enough refers to the amount of money needed, in this case to purchase a bicycle and the price of the bicycle is a specific amount.

A specific amount is needed to purchase the bicycle, therefore much is grammatically wrong, because it is non-specific in this context.

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I think much has the meaning of abundant, but as it doesn't indicate any degree related to "the money to buy a bike", enough fits better. I'm not completely out of confusion.