Stress should fall on the word or phrase to be emphasized. Listen to the following sentences.
1. Wáng Xiānsheng shì qùnián huí
Mr. Wang returned to
2. Jīntiān tā shì bú shì zǒulù lái
Was it on foot that he came to school today?
3. Zhèi jiàn shìqíng shì
gàosù wǒ de.
The teacher told me about it. /It was the teacher who told me about it.