1. In terms of words, this mainly means that English and American English use different words to express the same thing, or that the same words have different connotations in English and American English. It also means that the same words are used in English and American English. Differences in usage. The words used in English and American English are different and involve many small aspects of life.

2. In terms of pronunciation, the difference in pronunciation between English and American English is mainly reflected in the different pronunciations of the vowels a, o and the consonant r.

3. In terms of spelling, Americans are a pragmatic nation, and they also adopt a pragmatic attitude when it comes to spelling their words. During the development of American English, there was also a spelling movement similar to the Simplified Spelling Movement in my country, which deleted certain letters that were not pronounced in the spelling of words.

Extended information:

The development of American English:

The word English comes from Angles, which originally means "corner", which means they come from the corner of the European continent. In Old English, Angle was written as Engle, and their language was called Englisc (in Old English, "sc" was pronounced like "sh" in modern English, such as "sceap" - "sheep").

By the way, the c in "Celt" can be pronounced like s or k, so it is also called "Celtic". Many Americans are from Scotland and Ireland, so-called The "American accent" could be a Celtic accent. Isn't there a famous team in Boston called the "Celtics"?

Old English developed until the Norman invasion of France in 1066 AD. Before that, many Scandinavian and Latin words were incorporated due to the influence of the Nordics and Romans.

These loanwords make English an expressive language. Despite the incorporation of so many "loanwords," Old English still forms its core—fewer than five thousand Old English words survive to this day.

The development of British English:

Historically, the reason why English is popular around the world is all because of the power of the British Empire, and the most representative and influential British English (RP, Received Pronunciation, more commonly translated as: the pronunciation accepted by the general public. Educated non-dialect English is popular in the major university towns in the UK: Oxford and Cambridge, and is used in English for boarding school education and radio. , TV broadcasts in English), also known as "British accent", but there are still many countries that do not think so (especially the United States).

From the mid-20th century to the present, English has flourished because the United States has occupied economic, military and political advantages in the world. The world also considers American English to be the most important language at present. In particular, many American cultural products (such as movies, books, music) are active all over the world and have largely replaced products from other English-speaking countries.

British English remains the official language in many Commonwealth countries, including Australia, South Africa and India, as well as in the European Union. British English also continues to be spoken in the former British colony of Hong Kong.

Reference materials:

Baidu Encyclopedia-American English

Baidu Encyclopedia-British English