试题题干
Directions：Answer the following questions.
Use appropriate phrase structure rules to draw a labeled constituent structure tree diagram for each of the following sentences.
I think that you are from the South.
参考答案
试题解析
I是名词短语。
think是动词，you are from the South是句子1(从句)，动词和句子1构成动词短语。
名词短语和动词短语构成句子2(主句)。