40.she,the window ,open ,now.(用现在进行时连词成句.)
____She is opening the window now_.______________________
41.is,who,the window,cleaning?(连词成句)
____Who is cleaning the window?_________________________________
42.She is closing the door now.(改成否定句)
____She is not closing the door now.______________________________
43.You are doing your homework.(用"I"作主语改写句子)
____I am doing my homework.____________________________
44.they,the tree,sing,now,under.(用现在进行时连词成句.)
____They are singing under the tree now.____________________________
45.The Young Pioneers are helping the old woman.(改成一般疑问句)
Are the young Pionees helping the old woman?