18．What worried the mother most was __________ the Internet after class in this school．（　�。�
A．her son's not forbidding surfing
B．her son's not being forbidden to surf
C．her son's being not forbidden to surf
D．her son's having not forbidden surfing

分析 最使這位母親焦慮的是她的兒子在這所學(xué)校里放學(xué)后沒有被禁止上網(wǎng)．

解答 答案：B 考查動名詞復(fù)合結(jié)構(gòu)．動名詞復(fù)合結(jié)構(gòu)是由物主代詞或名詞所有格加上動名詞構(gòu)成．動名詞復(fù)合結(jié)構(gòu)的否定式是在動名詞前加not，排除C、D項，應(yīng)分別在being和having前加not；只能從A、B項中選擇；而son與forbid之間是動賓關(guān)系，要用動名詞的被動形式，排除A項，只有B項正確．

點評 此類問題的解答，首先要弄清楚獨立主格結(jié)構(gòu)與動名詞復(fù)合結(jié)構(gòu)的區(qū)別，然后根據(jù)題意選擇正確答案．

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