It is in this transition that the connotative reverse of the two theories was revealed.

It proposes that:(i)the implied agent of middle verb is arbitrary referential;(ii)two natures,the stative situation type and the generic meaning proposition can be found in middle constructions;(iii)the sentence initial NP of middle construction is generic with respect to referential meaning;and(iv)the sentence pattern meaning of middle constructions can be generalized as following:whenever .

This paper points out, mainly by analyzing four typical concepts of reader, namely, Riffaterre s "the supperreader", Iser s "the implied reader", Fish s "the informed reader" and Eco s "the model reader", that the theories of reader are valuable in emphasizing the reader s creative role in reading on the one hand, but impracticable in guiding an act.