What he wants is the car对第一句错在哪了？第一句不能用what可以用thatit is the car that he wants,定语从句主语从句不是可以用What引导嘛后面的是主语从句前面如果用it is sth that这是强调句的标准格式，也就是说主句是it is sth时，后面都用that