例句：1.The earth is smaller than the sun. [状态][真理性]
2.Tom gets up early every morning. [动作][经常性和习惯性]
3.Everybody knows him. [普遍性]
例句：1.Yesterday we went to the park.[动作]
2.The book was there ten minutes ago. [状态]
例句：1.Tom will help you tomorrow. [动作]
2.We shall be here in time next time. [状态]
例句：1.Ten years ago, Mary said she would finish the work in a few days. [动作]
2. Yesterday he thought you would be a good player after five years. [状态]
例句：1.We have done our homework. [动作]
2.He has been a doctor now. .[状态]
例句：1.Three days ago he had already finished his homework. [动作]
2.When he was a boy, he had already been a head of the boys. [状态]
例句：1.Tomorrow morning, I will have cleaned the windows. [动作]
2.Next Sunday, he will have been a new doctor. [状态]
例句：1.If he had worked hard enough, he would have built a new house. [动作] [实际情况是因为他不够努力，所以新房子连影子都没有]
2.If he were alive, he would have been a doctor now. .[状态][实际情况是他已经去世，所以永远成不了医生]
例句：Tom is reading a book.
例句：The dog was eating a bone.
例句：At ten tomorrow morning, I will be writing the letter for you.
例句：Jack told me that he would be working hard the next year.
例句：Tom has been reading this book for over ten hours.
例句：The workers had been building the railway then.
例句：They will have been making their efforts after that time.
例句：We thought they would have been doing physical training till then.