This concept by Halliday refers to the subject matter of the text.

This concept by Halliday reefers to the relationship between the author/speaker and the audience.

This concept by Halliday refers to how the text is constructed (written or spoken).

This speech style can be characterized by its extremely formal language which rarely changes.

This speech style is impersonal and is the language of business letters. Sentences have to be grammatical and words should be carefully chosen.

This speech style is that standard form of communication and is used in professional discourse.

This speech style is most appropriate during private conversations and is reserved for close family members or people.

This speech style makes use of slangs and colloquialisms. One has to be member of that speech group to be able to understand their specific register.

The use of private vocabulary and shared meaning due to long relationship.

The use of grammatical expressions and diction, and well organized ideas.

Asking for advice from a close friend as regards a serious problem

Planning for a group project with some members

Oathtaking of an elected government official.

Catching up with cousins during the vacation

A priest delivering his Homily

Reciting the prayer, "Our Father."

Use of contractions in communication

A teachers discussing the different elements in a communication process.

Asking a police officer about the exact location of an establishment.