That sir can flently speak three language

应该是fluently吧?可以放在句末,很多副词都可以放在句末,如You need go to school quickly。 再问： 不好意思，我在学写英语句子，还有一个句子帮我看一下有什么问题，谢谢 I received a letter was my pen friend send to me in Australia 这句又有什么错误呢 再答： 笔友是pen pal 收到……的来信是hear from 正常翻译这样： I heard from my Australian pen pal。 我收到了我澳大利亚笔友的信。 如果用你的原句，用宾语从句，不要用那个was，应该这样： I received a letter that my pen friend send to me in Australia。