One linguistic symbol can have different references while bearing the same sense. There are also occasions, though less frequent, when linguistic forms with the same reference might differ in sense.

Please define competence and performance respectively and describe their differences.

According to John Austin, what are the three acts a speaker might be performing simultaneously while speaking? And give examples to illustrate them.

language centers

interlanguage

utterance meaning

language standardization

coinage

root

linguistic context

AUX-movement