1.She's buying things for your birthday party.她正在买你生日的东西.

　　2.Who can help me? I can help you./Sorry,I can't.

　　谁能帮助我?我可以帮你。/对不起,我帮不了你.

　　3.The balloons are flying away.气球正在飞走.

　　4.The apples are falling down the stairs.苹果正从楼梯上掉下来.

　　5.Daming is having a birthday party.大明正在开一个生日聚会.

　　6.He is playing the trumpet, but the phone is ringing.他正吹小号,这时电话响了.

　　7.I'm really excited.我真兴奋。

　　8.He's riding his bike,but it's starting to rain.他正在骑自行车,这时天下起了雨.

　　9.She's eating dinner,but the phone is ringing.她正在吃晚饭,但是电话响了.

　　10.I bought you this book about America. I tlooks interesting.

　　我给你买了这本有关美国的书,看起来挺有意思.