英语强调句it is ...that/who..that/who可以用when换吗

当然不能用"when"替换了.
什么是强调句呢?
强调句是一种修辞,是人们为了表达自己的意愿或情感而使用的一种形式.
强调句的句构如下：
"It is (was)+ 被强调部分+ that (who) + 句子其他部分"
从强调句句构可以看出,强调句即便强调时间、地点也不能用when或where,而只能用"that"当然如果强调人时,用that/who都可以.
强调时间：It was yesterday evening that my father did the experiment in the lab.(注意没有用when)
强调地点：It was in the lab that my father did the experiment yesterday evening.(注意没有用where )
希望回答对提问者有所帮助.

扩展阅读：it+was+that强调句 ... 强调句is was的选用 ... it isthat强调句型例句 ... it is which 强调句用法 ... it is强调句 强调表语 ... it is that 万能强调句 ... 强调句把it is that去掉 ... it is强调句例子 ... it is强调句型结构 ...