本句的主句是Another thing was grammar.此句是典型的主+系+表 结构 系动词was是谓语 grammar是表语
that i think difficult 是that引导的定语从句,that在从句中作宾语,difficult是宾补,从句的先行词是another thing,
本句的主句是Another thing was grammar.此句是典型的主+系+表 结构 系动词was是谓语 grammar是表语
that i think difficult 是that引导的定语从句,that在从句中作宾语,difficult是宾补,从句的先行词是another thing,