English Basic Tenses        (时态)
他天天都来。他昨天来了. 他已经来了.他明天来.   汉语借助词汇伎俩而非词形态改变来表示动作发生,而英语主要经过谓语动词时态改变来表现.任何句子都要先注意时态.
He came yesterday.
He has come.
He will come tomorrow.
He comes every day.
v. / v-s/es
V-ed
will + v
would + v.
had + done
have / has + done
have/has been+ V-ing
am /is / are + V-ing
was / were + V-ing