一般现在时:主语＋be+--

　　主语＋do/doessth---

　　现在进行时：主语＋be+doingsth---

　　现在完成时：主语＋have/has+过去分词＋－－－

　　一般过去时：主语＋be+--

　　主语＋didsth+---

　　过去进行时：主语＋be+doingsth+---

　　过去完成时：主语＋had+donesth---

　　一般将来时：主语＋begoingtodosth---

　　主语＋will/shalldosth---

　　主语＋begoingtodosth---

　　主语+would/shoulddosth---

　　被动语态：主语＋bedone---

　　　主语＋bedone---

　　主语＋bebeingdone---

　　主语＋have/has/hadbeendone---

　　说明：do泛指动词原形,does泛指动词单三现,did泛指过去式,doing泛指现在分词,done泛指过去分词．

　　现分别举例如下：

　　Iamastudent.Heisintheroom.Theyarenothere.Shewasagirl.Iworkhard.Sheworkshard.Iamstudyingmath.Theywerestudyingmath.Theyaregoingtostudymath.Wehavestudiedmath.Youhadstudiedmath.Hewillstudymath.Shewouldstudymath.Mathisstudiedbyus.Mathwasbeingstudiedbyus.Mathhasbeenstudiedbyus.