【正确答案】正确答案：According to chomsky"s Generative and Functional Grammar, there is an underlying representation for any sentence. Then the underlying form is transformed into the surface form through some transformational rules. The same underlyilyng form may result in different surface representation by undertaking different operation. Sometimes, the same surface form is likely to be transformed from different deep structure because of various movement. "Stand sb. up" means that sb. fails to show up in a date though he has promised to appear, and let the other wait for him in vain. The underlying form of the above three sentences have the same underlying form, that is " She stood the man up who offered her a diamond". The reason why they finally have the different form is that they have undertaken different operation. Because "up" is an adjunct in the three sentences, it is more convenient to put it since it will not change the property of the sentence. Therefore, finally we get the three kinds of surface forms. Sentence one, "up" is moved upward to the front of the man for the purpose of banlancing the sentence. Sentence two, "up" is moved upwards to the front of the attrubutive clause to the front of the attributive clause in order to achieve coherence. And the last sentence is the underlying form. Consequently, we can say that it is very flexible to position the adjunct in a sentence for various purposes.