- Jane wasn't in when Jack came,was she?- No,she wasn't,but she returned a few minutes later.

——当杰克回来时,珍妮不在家,是吗?——是的,她不在家,但是,她几分钟后回来了.为什么这里的回家是用" in ",用能 " at home "吗?“in”和“at home”都是表示“在家”的意思，in是副词，at home是介词短语。