It's no wonder 后常用that 这里it 是形式主语, 真正的主语是that引导的从句,相当于汉语的难怪怎么了. eg . He is from America . It is no wonder ( that ) he speaks good English . 再问： 那可不可以是it is no wonder（ that） why he speaks good English 呢 再答： 这里不能用why , that 引导一个陈述句， 句子不缺成分。it's no wonder that 是对某个事实不足为奇。 要用why 那就要用 wonder eg . I am wondering why you are late for the meeting . 我想知道你为啥迟到了。
