绝代双椒
答案：He has repaired his bicycle.
同义句：The bicycle
has been repaired by
him.
解析：根据“已经”我们知道这个句子应该使用现在完成时。
现在完成时含义：是过去的动作或状态持续到现在，或对现在造成的影响，可能持续发生下去。
它的构成是：主语+助动词(have/has) +动词的过去分词。（done）
主语是 he 所以助动词选择has，
所以答案是
He has repaired his bicycle.
同义句：可以改为被动句。
The bicycle has been
repaired by him.
(自行车被他修好了。）
温柔一刀半
他已经修好了他的汽车。He has already mended his car.同义句是His car has been already mended by him.
