youarecross和youaregoacross和youarewalkaross对吗,为什么be不加动原,go不加v-ing'帮下

Question

you are cross和you are go across 和you are walk aross 对吗,为什么be不加动原,go不加v-ing'
帮下

Answer 1

you are cross和you are go across 和you are walk aross 对吗,为什么be不加动原,go不加v-ing'
答：You are cross.对.cross 可以作形容词:
cross / krCs; @ krR:s; krRs/ adj (-er,-est)
1 (with sb) (about sth) (infml 口) rather angry 生气的; 恼怒的
I was cross with him for being late.他迟到了,我很生气.
What are you so cross about?你为什麽发那麽大的火啊?
She gave me a cross look.她瞪了我一眼.
2.you are go across 和you are walk across 一样是错误的.因为are如果作系动词,后跟非谓语动词作表语：如：The news is exciting.They are excited.及 They are gone.(他们走了）
如作助动词,则跟过去分词表被动,现在分词表进行：You are going across the street.