Linguistic forms having the same sense may have different references in different situations while linguistic forms with the same reference always have the same sense.

“The student” in the sentence “The student liked the linguistic lecture.”，and “The linguistic lecture” in the sentence “The linguistic lecture liked the student.”belong to the same syntactic category. 点击查看答案&解析

A compound is the combination of only two words. 点击查看答案&解析