A sentence is a （） concept, and the meaning of a sentence is often studied in isolation.

inflectional morphemesn

According to the ways antonyms differ, how many groups can we classify antonyms into?

Duality

What essentially distinguishes semantics and pragmatics is whether in the study of meaning （）is considered.

What are the major distinctions between langue and parole?

locutionary act

As modern linguistics aims to describe and analyze the language people actually use, and not to lay down rules for "correct" linguistic behavior,it is said to be （）.

All words may be said to contain a root morpheme.

Of the three branches of phonetics, the longest established, and until recently the most highly developed, is（）phonetics.