1)在否定句或疑问句中可用so…as。
Hecannotr unso/asfastasyou.2)当as…as中间有名词时采用以下格式。
as+形容词+a+单数名词
as+many/much+名词
Thisisasgoodanexampleastheotheris.
Icancarryasmuchpaperasyoucan..3)用表示倍数的词或其他程度副词做修饰语时,放在as的前面。
Thisroomistwiceasbigasthatone.
Yourroomisthesamesizeasmine. 4)倍数+as+adj.+as <=>倍数+then+of
Thisbridgeisthreetimesaslongasthatone.
Thisbridgeisthreetimesthelengthofthatone.
Yourroomistwiceaslargeasmine.
Yourroomistwicethesizeofmine.