是playing a piano 还是playing piano

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• she is playing the piano now (is playing 是be动词+实意动词—做谓语）吗?now在句中做什么成分?是做状语修饰"piano"吗?
• 1、Tony was ill yesterday,so he_____his homework.A.didn't B.no did C.didn't do D.didn't did2、I can hear someone_____ the piano in the next room.A.play B.playing C.to play D.are playing3、The students talked and laughed,but when the teacher came into the classroom,they______their lessons.A.stopped to do B.stopped doing C.stopped D.stop to do4、He is______unusual basketball player.A.a B.an C./ D.of5、--What rule did you______ yesterday?--I_____ late for cla
• 一道英语时态题,进来看看吧,yesterday afternoon they ___________(play）basketball with their English teacher.我填的是were playing 答案是played那么此时怎么判断如何使用一般过去时和过去进行时呢?
• She is good ______playing the piano and good her students ,which is good ____the studentsA at for to B to to for C at to for Dto at for我选的是第四个,你认为囊
• They are playing w___ their balls.括号里是with吗?
• jane is good at playing the piano,请划分一下句子成分.越细越好.
• I like playing ____ soccer,but she likes to play ___ piano.用a ,an,the 填空 并语法说明
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• piano is a kind of musical instrument 还是the piamo is a kind of instrument
• 若（m+2）的平方x的立方y的n-2次方是关于x,y的六次单项式则m= ,n= .
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