Depending on the demands of a particular communicative situation，bilingual or multilingual speakers may change between language varieties in the middle of speech or even in the middle of a sentenc

Distinguish sentence meaning and utterance meaning by using examples.

Use appropriate phrase structure rules to draw a labeled constituent structure tree diagram for each of the following sentences.

1) The naughty boy cheated his teacher.

2) The old man put the book on the table.

3) I think that you are from the South.

1inguistic determinism and relativism

1anguage acquisition

comparative reconstruction

speech community

interpersonal communication

contextualism

Move

arbitrariness