1.We ought to have cleaned the room.
翻译:我们本应该打扫房间的.
2.I expected him to come but he let me down.
翻译:我期盼着他来但是他却让我失望了.
3.The book I bought yesterday is worth reading.
翻译:昨天我买的那本书值得阅读.
4.My TV does not work.I must have it repaired.
翻译:我的电视坏了,我得让别人修修它.
5.Do not be discouraged no matter what happens.
翻译:无论发生了什么都不要泄气.
完全同意feifei7155的回答!给他家分吧!