It is when不是强调句.强调句的基本句型是It is加强调部分+that加一个句子的其余部分.判断强调句的简单方法是去掉it is that，看句子是否成立。如果还成立，就是强调句。比如说it is on the farm that Tom and Jane met each other for the first time.这里就是强调他们第一次见面的地点，框架去掉这个句子是成立的
it is when是强调句吗
it is when是强调句，例如：It is when I was ten years old that I came to know the answer.正是我十岁时我认识了这个答案。
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