Not until she had arrived home did she remember her appointment with the doctor.
如果强调的是特殊疑问词，要用 “特殊疑问词+is/was + it + that +…nt to see? Where was it that you saw the teacher? Why is it that you want to change your mind?
区分下例两句： It was 7 o’clock when he came back. 他回来时7点钟了 . It was at 7 o’clock that he came back. 他是7点钟回来的。
注意 " not ... until " 强调句型 Compare the following：
1 什么是强调？
人们在交际过程中，为了使自 己的思想能为别人恰当的理解， 往往突出重要的内容，这种突 出重要内容的行为就是强调。
2. 强调的手段
可以通过语音手段、词汇手段、 语法手段来进行强调。
(3) 语法手段 1 用It is／was…that／who… 句型表示强调。
被强调的部分（不能是谓语） 放在is／was的后面，如被强调 的是人，则后面可用who/that； 如被强调的是物，则后面只能 用that 。
He met an old friend in the park yesterday. 强调地点状语 It was in the park that he met an old friend yesterday. 强调时间状语 It was yesterday that he met an old friend in he park.
4. It was the training _____ he had as a young man _____ made him such a good engineer.
A. what; that B. that; what C. that; which D. which; that
5. --- Were all three people in the car injured in the accident? --- No, ______ only the two passengers who got hurt. A. there were B. it were there was D. it was C.
He met an old friend in the park yesterday. 强调主语 It was he who/that met an old friend in the park yesterday. 强调宾语 It was an old friend that/who he met in the park yesterday.
2. It was not until 1920 _____ regular radio broadcasts began. A.which C. that B. when D. since
3. She said she would go and she ________ go. A. didn’t C. really B. did D. would
She didn't remember her appointment with the doctor until she had arrived home.
It was not until she had arrived home that she remembered her appointment with the doctor.
你究竟为什么要改变主意？
2 用助动词do, does或did来强 调谓语动词。 Do come early. He did send you a letter last week.
We’re pleased that she does intend to come.
Exercises: I. Fill in the blanks 1. It _____ Mike and Mary who helped the old man several days ago . A. was B. are C. were D. had been