I saw you stand(ing) at the door.

I saw you stand(ing) at the door. i saw you cycling when i went to have lunch at the door of d I had to stand at the door to waite my father because I lost can you stand ()the door?填空 比如说：I saw he _____on the door 一道七年级英语题I saw someone knocking at the door.为什么用knocking,see I recognized you __I saw you at the airport. i seem to hear someone knocking at the door,knocking为什么要加ing stand ____ the subway door[in/to/at/on/] stand in the door When jim saw me,he opened the door at once 英语翻译when she opened the door and saw her husband stand in fr