They're on the

They're on the They're on the table. they're on the desk. they’re on the tip of my 英语翻译~they're riding on the axle No,they aren't.They're on the chair. They're putting on lights on the Christmas tree对They‘re后面部分的提问. They're working hard on the field改为感叹句 They're working hard on the field改为感叹句 they`re on the chair.改为否定句 they‘re on (sell) at the shop怎么写 They're on the bookstore写出问句(书本） they're rubbing off on we're on the are they?they're on the waterA,what B where C how 英语翻译They're over there on the left,just across from the koalas. They're all over the 英语副词的问题They're always on the move,为什么会有这个're,不是不用加的吗