现在完成时：I have written a letter.我已写完了一封信
祈使句：Stand up!起立!
一般过去：I went to shool late yesterday.昨天我上学迟到了.
一般将来：I will go to the USA.我将来要去美国.
过去将来：I didn't know if he would come.我不知道他是否会来.
现在进行：I am singing.我正在唱歌.
过去进行：I was having a talk with Li Hua at that time.那时,我正在跟李华谈话.
现在完成感叹：How foolish I have been!我多么傻啊!
过去完成感叹：What a crime he had committed!他犯了多大的罪啊!
选择疑问句：Is she a housewife or a nurse?她是一个家庭主妇还是护士?
反义疑问句：They work hard,don’t they?他们工作的很辛苦,不是吗?