书上说是定语从句.it在不知道是谁的情况下可以表示人,然后that就是连接词
问题描述：
书上说是定语从句.it在不知道是谁的情况下可以表示人,然后that就是连接词
答
什么东西?看不懂.///
应该是说在先行词既有人又有物时,关系代词用that,
比如There are 2 boats and 3 people that I saw in the park in this picture.
这里的先行词是2 boats and 3 people 既有人又有物,所以定语从句I saw in the park 用that做关系代词
答
还是Who is it that won the first prize in the later National Maths Competation?这句话吧.再分析一下：1.Who is it ?为主句,that won the first prize in the later National Maths Competation为that引导的定语...