新概念 2A 总复习Part 1 时态一、现在进行时:表示说话时正在做的事情1、基本结构:be+doing (do 代指所有动词原形)肯定句:主语+am/is/are+doing...... My mother is talking with the dentist.否定句:主语+am/is/are not+doing... They aren’t playing game...
时间:2025-04-02 10:19栏目:行业资料