－what were you doing when your father came back?

－what were you doing when your father came back? what were you doing when your father （came） back? When your father came to the school,what were you doing?改为同义 --What were you doing when your father ( )back from Sydney y Were your doing your homework when your father came back?A,d what you when your mother came back? what were you doing when he came to see you? what()you(do)when your father comes back When he came back,what are you doing 为什么用when 英语时态填空1.What were you doing when he came to see you yesterda what were you doing when Tom came to see you?A.have jusi put -- What were you doing when he came to see you?-- I had just