
| 时间 | 现在 | 过去 | 将来 | 过去将来 |
|---|---|---|---|---|
| 一般 | work/works | worked | will/shall work | would/should work |
| 进行 | am/are /is working | was/were working | will/shall be working | would/should be working |
| 完成 | have/has worked | had worked | will/shall have worked | would/should have worked |
| - | 现在 | 条件从句 | |
|---|---|---|---|
| 与现在、将来事实相反 | If I(we, you, he, they)+ 动词过去式,be 的过去式用were | I(we) should + 动词原形 He(You, They) would + 动词原形 | |
| 与过去事实相反 | If I(we, you, he, they)+ had+ 过去分词 | I(we) should+ have+过去分词 He(You, They)would + have+过去分词 |

