Question

Birds'singing is sometimes a warning to other birds________away.

A．staying

B．stayed

C．stay

D．to stay

Answer 1

D

試題分析：句意：鳥的叫聲有時是警告其他的鳥要離開。因為該句已經(jīng)有系動詞，故不缺少謂語動詞，排除C；warning是抽象名詞，它的后面常用不定式作定語，故選D。
點評：本題難度適中。非謂語動詞是高中階段的重難點之一，內(nèi)容多又雜，不容易理解，需要考生有分析理解復(fù)雜的句子結(jié)構(gòu)的能力。題目的設(shè)置注重了情景化和結(jié)構(gòu)復(fù)雜化，加大了考生對題干句的理解難度。設(shè)問的角度呈現(xiàn)出多樣化趨勢，不僅僅是非謂語間的互相干擾。
即學(xué)即練：The old man sat in front of the television every evening, happy _______anything that happened to be on.
A. to watch               B. watching    C. watched        D. to have watched
解析：A。動詞不定式短語作原因狀語。句意：那位老大爺每天晚上坐在電視機前，非常開心地觀看即將上映的任何節(jié)目。“happy ____anything that happened to be on.”作目的狀語。