现在进行时的结构_现在进行时_英语语法网

网站介绍：现在进行时的结构：现在进行时由am / is / are + 现在分词构成。如： I'm studying at Yu Cai Senior Middle school. 我在育才中学读书。 He is writing on the desk. 他再课桌上写字。 They are talking about their visiting the Great Wall. 他们在谈论游