试题题干
Judge whether each of the following statements is true or false. Write T for true(of the ten statements, only ONE is true) or F for false in the blank offered after each statement.Give a correct version for each of the false statements.
The constituent which is always present on the right side of the arrow in a PS rule is called an optional constituent.
参考答案
试题解析
在短语结构规则中，总是出现在箭头右侧的成分称为强制成分。