these are their friends怎样改一般疑问

these are their friends怎样改一般疑问 these are their friends. [改为一般疑问句】 These are my parents .(改一般疑问) This is my mother. These books are ours.(改为一般疑问 their friends are tourist变一般疑问句 these are their parents(改为一般疑问句) jenny and i are good friends.改一般疑问句怎样改 these.are.caes.their 怎样排成疑问句 These are books?改一般疑问句. THESE are tomatoes 否定：疑问：肯否回答：those apples are red 一般疑问： These are his friends（改为一般疑问句） 连词组句 these,are,cases,their.（一般疑问句）