Is开头的问句是一般疑问句，否定回答要用no，后面接上人称代词he，she或it+isn't.具体用哪个人称代词要看名词的意思，若名词是单数物品用it，如Is this a book? No， it isn't.若是男名则用he，如Is Jack your brothet? No， he isn't.若是女名用she，如Is Lily English? No， she isn't.
