大学英语四级- 语法篇时态复习时 态 过去 现在 将来 过去将来 一般 did do will/shall do should/would do 进行 was/were doing am/is/are doing will/shall be doing / 完成 had done have/has done will/shall have done should/would have done用于虚拟语气 完成进行 had been doing have/has been doing / / 过去 现在 将来 过去将来 一般 was/were given am/is/are given will/shall be given should/would be given 进行 was/were being given am/is/are being given / / 完成 had been given have/has been given will/shall have been given should/would have been given 完成进行 / / / ?时间状语从
