【正文】
現(xiàn)在進(jìn)行時(shí)態(tài) : 基本形式: I 用 am, you 用 are, is跟著 he/she/it,要問復(fù)數(shù)(we/they/you)用什么,全部都用一個(gè) are。 含有“ ing”的句子: 1 Daming is having a birthday party. 2 He is playing the suona. 3 Daming is playing the suona again. 4 Daming is playing the suona for the third time. 你發(fā)現(xiàn)下面三句子有什么共同點(diǎn)了嗎 is playing the suona, but the phone rings. is playing the suona again, but the bell rings.