一般现在时：be(am are is+done)一般过去时：was/were+done 现在进行时：am/are/is+being+done过去进行时：was/were+being+done现在完成时：has/have+been+done过去完成时：had+been+done一般将来时：will+be+done;is/are/is+going to be done；is/are/am+to+be done过去将来时：would+be+done; was/were going to be done; was/ were to be done现在完成进行时：has/have been being done 过去完成进行时...
