Affirmative/negative sentences with 是
S + 是 + (không phải là) + danh từUse '是' (shì) to affirm identity, occupation, or relationship. Use '不是' (bú shì) to negate. This is the most basic structure for introducing yourself or others.
她是女人。
She is a woman.
他不是老人。
He is not an old man.