【答案解析】In terms of surface structure, these two sentences are similar. However, they are indeed quite different, as far as the deep structure is concerned. In the first sentence, the logical relationship represented by the deep structure should be that "John" functions as the direct object of the verb "to please"; thus, the meaning can be interpreted as: it is easy for others to please John. Nevertheless, in the second sentence, the case should be that "John" functions as the subject of the verb "to please"; with the whole sentence meaning: John is eager that he pleases others. It cannot be interpreted like the first one, such as "it is eager to please John", because concerning the semantic components of the adjective "eager", its subject should be a noun or a pronoun which refers to a being that is animate.