This document provides information and examples of cleft sentences in Vietnamese. It discusses using cleft sentences to lớn emphasize the subject, object, or adverbial element of a sentence. There are three main types of cleft sentences: subject focus, which emphasizes the subject; object focus, which emphasizes the object; and adverbial focus, which emphasizes an adverbial phrase. The document provides examples for each type, such as "It was my brother who collected these foreign stamps" for subject focus. It also includes exercises for the reader to lớn practice forming cleft sentences.

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