Analyze and comment on the following.He is as poor as a church mouse. Pick out the idiom in this sentence, then point out its structure, grammatical function and figure of speech.

Analyze and comment on the following.He is as poor as a church mouse. Pick out the idiom in this sentence, then point out its structure, grammatical function and figure of speech.

(L)THE IDIOM IS “AS POOR AS A CHURCH MOUSE”.
(2)ITS STRUCTURE IS : AS+ADJ.十AS+N.
(3)ITS GRAMMATICAL FUNCTION： ADJECTIVE IDIOM AS PREDICATIVE IN THIS SENTENCE.

(4)SIMILE.