Compare Formal English to Informal English?

Answer 1

Formal EnglishThe English that you should use when writing a paper or thesis should be formal (like a legal document) but also clear (unlike a legal document). There are certain things that can be done in spoken English or in written English in newspapers, magazines, or lecture notes (or web pages like this) which are not appropriate for formal writing. Informal English

The use of slang word in speaking or normally interacting with friends is called informal English.

Formal - Don't use contracted forms, use the entire auxiliary verb:

They have lived in New York for many years.

Informal - Use contracted forms.

They've lived in New York for many years.

Answer 2

Formal English is used in professional or academic settings and follows strict grammar and vocabulary rules. Informal English is more relaxed and casual, often using slang, contractions, and colloquial expressions. Formal English is typically used in writing such as reports or essays, while informal English is more common in everyday conversations.