-your father is a soldier,isn't he?- no,but he used to be.这里为什么不能回答no,but he used to.什么情况下可以用No，but he used to.来回答呢？具体一点哦，最好有例句哦。

Is this a photo your father? Is your father a doctor?怎么回答? Your father is a young 修改错误 Is this a photo your father? My father is a worker ; ____is your father ? My father is a doctor.What's your father?(改为同义句) My father is a doctor.()()your father? Your father is sleeping,so you should go__his room quietly,mother said.Your father is sleeping,so you should go__his room quietly,mother said.A.past B.through C.over D.across His father is a t______,so he is very rish. Is your father ()()today? is your father here is your father in Your mother doesn't expect you to be a bad child ,and_______.A.so doesn't your father B.so your father doesn'tC.nor your father does D.nor does your father your father is a cook .And your mother?同义句转换,Your father is a cook._____ _____your mother? your father is at a meeting your father ___ ____a meeting Your aunt is your ________()Your aunt is your ________.（ ） A 、father’s sister B 、mother’s sister C 、mother’s father D 、father’s mother Your father is a mother older than you. Is your father a teacher?Where?he?(work) Where is your father He is___ a visit to Beijing.