Chinese conversation Are these Chinese sentences correct? I don' have any confidence. ①. 你妈妈是老師吗？(Is your mother a teacher? ) 不是、我妈妈不是老師。(No, my mother is not a teacher.) ②王先生没有儿子。李先生呢？ (Mr. Wang has no sons. How about Mr. Li?) 他没有儿子。 (He doesn't either.) ③这个女孩子是谁？ (Who is this young lady?) 她是我姐姐。 (She is my older sister.) ④你大哥有儿子吗？ (Does your big brother have a son?) 不是、他没有儿子和女儿子。 (No, he doesn't have any sons, nor does he have any daughters.)