himba

What 引导的名词性从句做主语－主句谓语动词由 be 动词后的名词决定。What 在句中做主语：What is… is…. / What are … are… e.g. What is difficult to understand is A.；What are difficult to understand are A and B.What 在句中做宾语：What I want is A.；What I want are A and B.e.g. What I want is your happiness.；What I want are good job and happy life.