13、a number of后面加复数名词或代词,其动词用复数形式;但the number of后面加复数名词或代词时,其谓语用单数。 14、在定语从句中主语是关系代词who , that , which , 谓语动词的数应与先行词的数一致。 注意 在“one of +复数名词+ who/that/which”引导的定语从句...