I Conditional Stems 基本构成：

直陈式简单将来时的词尾换成直陈式未完成过去时的词尾构成

To conjugate in the conditional, add the appropriate ending to the future stem

Subject

Ending

je

-ais

tu

-ais

il

-ait

nous

-ions

vous

-iez

ils

-aient

  • For (regular and irregular) -er or -ir verbs, the infinitive is the future stem.
  • For (regular and irregular) -re verbs, the infinitive minus the final e is the future stem.
  • Exception: Verbs that are stem-changing in the present are stem-changing in the conditional also.
  • Exception: Certain irregular verbs have irregular conditional stems. (Not all irregular verbs have conditional stems).