the teachers don't teach french in our school改被动语态

french did not taught by the teachers in our school

应该是：French isn't taught by the teachers in our school.

被动语态的句子是以“be动词+过去分词”的形式来表达，如果要特别强调动作或行为的执行者时，句子后面需接by～，译为“被（由）……”。

被动语态的句型

肯定句：主语+be+过去分词+（by～）.

否定句：主语+be not+过去分词+（by～）.

一般疑问句：Be+主语+过去分词+（by～）？

特殊疑问句：疑问词+be+主语+过去分词+（by～）？

被动语态的时态是由be的时态决定的，be是什么时态，全句就是什么时态，be动词后面的过去分词不变。

french isn't taught by the teacher in our school。