Final answer:
Expressions or grammar associated with ordinary speech, such as colloquialisms, slang, and dialects, are commonly used in everyday conversation and vary by region or social group. They are not typically used in formal settings like job interviews, where standard English is preferred.
Step-by-step explanation:
The kind of expression or grammar that is associated with ordinary, everyday speech includes things like colloquialisms, slang, and regional or social dialects. These forms of language are typically used in casual conversation and may not always adhere to the strict rules of standard English grammar. Colloquialisms, for instance, are informal words or phrases that are commonly used in spoken language within a particular geographical area or by a specific group of people. Slang consists of words or phrases that are often trendy or specific to a particular subculture, and they can evolve rapidly. Dialects, on the other hand, are distinctive versions of a language that include particular patterns of grammar, vocabulary, and pronunciation, and they can vary by region or social group.
Examples of such informal language include Southern expressions like 'y'all' and 'ain't', or Californian phrases like 'hella'. While these expressions provide color and authenticity to speech, they might be perceived as too casual in formal contexts like a job interview. When writing or speaking in a professional setting, it is generally advised to use standard English, which avoids such colloquialisms and slang to maintain formality and clarity.