《What Are You Doing?》Going to Beijing PPT
《What Are You Doing?》Going to Beijing PPT第4页

Jenny is looking out of the window on the train. 詹妮在火车上正往窗外看。

知识点 1

主语+ be(am,is,are)+ 动词的现在分词+ 其他. be 动词要和主语在人称和数上保持一致。

结构:

I am reading a book. 我正在读书。 She is singing a song. 她正在唱歌。 They are flying kites. 他们正在放风筝。

例句:

现在进行时的句子