Contents introduction chapter I. Bases of english language and its stylistic layers

CONCLUSION
One of the greatest fears affecting non-native speakers of English is not just being misunderstood but also being inappropriate when trying to express something. People often speak of language as being correct or incorrect. It would be more accurate to refer to particular language structures as being formal or informal, appropriate or inappropriate for a specific context.
We use formal language in situations that are serious or that involve people we don’t know well. Informal language is more commonly used in situations that are more relaxed and involve people we know well.
Formal language is more common when we write; informal language is more common when we speak. However, there are times where writing can be very informal, for example, when writing postcards or letters to friends, emails or text messages. There are also examples where spoken English can be very formal, for example, in a speech or a lecture. Most uses of English are neutral; that is, they are neither formal nor informal.
Formal language and informal language are associated with particular choices of grammar and vocabulary.
Contractions, relative clauses without a relative pronoun and ellipsis are more common in informal language.
In everyday conversation we do not have to follow the rules of grammar as carefully as we would in a formal address or a business letter. If we adhere too closely to formal rules of grammar in an informal situation, we may come across as being stuffy and unnatural.
It is like wearing a tuxedo or a formal gown to an ordinary business meeting. Formal English follows rules of grammar very strictly. Sentences tend to be longer and more complex. It tends to be used in professional and business situations. It is also better organized and thought out.
Informal English on the other hand is generally used with friends and family. A number of grammar expressions have common forms which differ in their formal or informal use. These differences are noted both in written and spoken English. However, they are most notable in written English.
As seen in ESL lessons, participating effectively not only requires a solid grasp of English grammar, but also an understanding of key communication factors. If you want more helpful language hints as to the most appropriate forms of English or key points to take into consideration each time you are using English, read on.
These are just some of the differences between formal and informal writing. The main thing to remember is that both are correct, it is just a matter of tone and setting.
Formal English is used mainly in academic writing and business communications, whereas Informal English is casual and is appropriate when communicating with friends and other close ones.
Choose the style of writing keeping in mind what you are writing and to whom. But whichever style you write in - formal or informal - be sure to keep it consistent, do not mix the two.
We use formal and informal language in different situations. The choice of words, grammar and tone differ greatly between formal and informal language.
When do we use Formal Language? We mostly use formal language when writing. Think of academic articles, business emails or reports, but we also use formal language when giving lectures or presentations. In these situations the language and tone is less personal, we do not use casual language or colloquialisms.
When do we use Informal Language? Informal language is mostly used while talking as it is more impulsive and casual, think of everyday conversations with your family and friends.
While formal language theory usually concerns itself with formal languages that are described by some syntactical rules, the actual definition of the concept "formal language" is only as above: a (possibly infinite) set of finite-length strings composed from a given alphabet, no more nor less.
In practice, there are many languages that can be described by rules, such as regular languages or context-free languages. The notion of a formal grammar may be closer to the intuitive concept of a “language”, one described by syntactic rules. By an abuse of the definition, a particular formal language is often thought of as being equipped with a formal grammar that describes it.
Informal language is not just used when we are talking however, we can also use informal language when we are writing such as writing a postcard to a family member or sending a text message to a friend or some business correspondences. In these situations we use casual, colloquial language and our tone is a lot more personal.
How does the tone differ? The tone we use with formal language is a lot more rigid and less relaxed or friendly. Whereas the tone we use with informal language is more personal and relatable.
How does the grammar differ? We do not use contractions in formal language.