1.they are waiting for a taxi.改否定句 2.my mother is cleaning the room now.改否定句教教我吧,不然老师会骂死我的!

They are waiting ( ) the bus.They are waiting ( ) the bus stop.介词填空 they are waiting for their Mum划在they下面 Did you konw__at the bus stop?选项A.who are they waiting for B.whom they are waiting for C.whom they were waiting for They are waiting for the train?的英文翻译 Who are they waiting ___the bus stop (填什么） They are waiting什么us什么the bus stop. they ,for ,bus ,the,waiting,are,a 连词成句 （they are） waiting for the bus.画线部分提问 they,who,are,for,waiting ) 连词成句 They are waiting for their MUm.（提问） they are waiting for you为什么加ing They are waiting for Mary 用who对Mary提问. They are waiting for mary.用who对mary提问 They are waiting for their father _____(have) supper. They are waiting for you at the library是什么意思 Do you know ______ at the bus stop?whom they are waiting for B．who they are waiting C． whom are they waiting for D．who are they waiting They are waiting for a friend .改成一般将来时态 They are waiting for the bus?划线部分为：waiting kor the 对划线部分提问