什么后面加be doing?答:be doing表示正在进行时2113 go, come, leave, arrive, drive, fly, return, work, sleep, stay, play, 等等接be动词5261都可以,,,譬如你老妈喊你4102关电脑快下来吃饭,,你1653说i am coming! 我来拉,,正在下来的意思,,am is are 就是be动词 ...
英语语法答:介词:in on by after befor at down upon to 介词后面一般加名词或动名词after before后面加时间形容词很多,是修饰名词的,比如漂亮的,可爱的副词:一般修饰动词,比如run quickly,quickly就是副词,表示很快地,一般后面加个ly的都是副词,除了个别以外,比如friendly是形容词,family是名词助动词:must need can dare ...