4. 强调句的特殊疑问句形式
强调句型的陈述句形式和一般疑问句形式一般还好理解，但若以特殊疑问句形式出现，则很容易误解。比较：
Jim told us the news.(非强调句)
It was Jim that told us the news.(强调句型的陈述句形式)
Was it Jim that told us the news.(强调句型的一般疑问句形式)
Who was it that told us the news.(强调句型的特殊疑问句形式)
特殊疑问句形式的强调句可视为对陈述句强调中的被强调成分提问得来，如对It was yesterday that he arrived. 这一句中的yesterday提问，即得到When was it that he arrived?
5. not...until用于强调句
其基本形式为It is (was) not until…that…。比较：
He didn’t come until his wife left. 他妻子走了之后他才来。
It was not until his wife left that he came. 他妻子走了之后他才来。
They didn’t start until the rain stopped. 直到雨停他们才出发。
It was not until the rain stopped that they started. 直到雨停他们才出发。