1. You can check prices for bicycles on the Internet.

2. You can check prices about bicycles on the Internet.

(What is the meaning of 'for' in Sentence 1? Does 'for' mean 'about'? Are both sentences the same in meaning? Can we substitute 'about' for 'for'?)

yes, both sentences have the same meaning.

In sentence 1, the word "for" indicates the purpose or intended use of the action. It means that the purpose of checking is to find out the prices of bicycles on the Internet.

In sentence 2, the word "about" indicates the topic or subject. It means that the purpose of checking is to find information or details about bicycles on the Internet.

While both sentences convey a similar idea, they have subtle differences in meaning. Sentence 1 focuses on the specific action of checking prices, while sentence 2 focuses on gathering information in general.

You can substitute "about" for "for" in sentence 2, but the resulting sentence may have a slightly different emphasis. It would then read, "You can check prices about bicycles on the Internet." This version suggests a broader scope of information, rather than solely focusing on the prices.

In sentence 1, the word "for" is used to indicate the purpose or intention behind checking the prices. It implies that the person wants to find the prices in order to potentially purchase a bicycle.

On the other hand, in sentence 2, the word "about" is used to indicate that the prices are the subject or topic of interest. It implies that the person is seeking information or knowledge about bicycle prices.

While both sentences convey a similar idea, they have slightly different meanings. Sentence 1 suggests that the person is specifically interested in purchasing a bicycle and wants to know the prices for that purpose. Sentence 2, on the other hand, suggests a more general interest in gathering information or knowledge about bicycle prices.

As for substituting "about" for "for," it's not a direct substitution because they convey different meanings. However, if you want to use "about," you can rephrase sentence 1 as "You can check prices about bicycles on the Internet." This will convey a broader interest in learning about bicycle prices rather than solely intending to purchase one.