The sentence pattern of the stressed sentence: Yes/Zeng+emphasis part (usually subject, object or adverbial) +that/who (emphasis subject, subject refers to person)+other parts. It was yesterday that he met Li Ping. Emphasis sentence pattern is a special sentence pattern, which is used to express the speaker's strong feelings or wishes. Emphasis is to make the information contained in a certain part of a sentence more important than usual by some means.

The structure of the emphasis sentence pattern is as follows: 1 Basic sentence pattern: It is/was+ emphasis part +that/who+ other parts. Problems between parents and children can be solved by listening and understanding. Only by listening and understanding each other can the problems between children and parents be solved. It was Paul who broke the window just now. It was Paul who broke the window. Emphasized sentences are basic grammar, rhetoric and a form used by people to express their wishes or feelings. The commonly used emphasis structure in English is "It is (was)+ emphasized part (subject, object or adverbial) +who (that) ... Emphasize a part of a sentence in various ways, thus playing a rhetorical role.

Generally speaking, who is used when the emphasized part refers to people; This is used to refer to things, but it can also refer to people. When referring to things in American English, it is often used instead of that.