Train as hard as you can__you will win the swimming competition填and可以吧，那为什么不能填then啊

苍穹 3小时前

• 

  我心乱

  2小时前
  这是个并列句，由祈使句+ 另一个表示结果的句子构成，所以中间通常要有并列连词and或or。then是副词, 如果要用的话, 它的前面必须用逗号，这时候它就可以起连接词的作用。下面的几个句子都正确，但要注意标点符号：Train as hard as you can and you will win the swimming competition.Train as hard as you can, and you will win the swimming competition.Train as hard as you can and then you will win the swimming competition.Train as hard as you can, and then you will win the swimming competition.Train as hard as you can, then you will win the swimming competition.
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