1、加do,does的， 如：I did ask you the question.我确实问过你这个问题。 2、It is...that 去掉这个结构后仍是一个完整的句子，要与定于从句加以区别，还有注意人称主格还是宾格。 如：It is chairman of the department that the teaching staff elected him. 去掉结构后就是The teaching staff elected him chairman of the department.注意我一个词都没有改动。这样的就是强调句，所以经常是"It is I..."不是"It is me..."