be+过去分词+to+副词是什么意思例如:Old people must be spoken to politely.be+过去分词是被动语态,那么to politely是什么意思.

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be+过去分词+to+副词是什么意思例如:Old people must be spoken to politely.be+过去分词是被动语态,那么to politely是什么意思.

be+过去分词+to+副词是什么意思例如:Old people must be spoken to politely.be+过去分词是被动语态,那么to politely是什么意思.
be+过去分词+to+副词是什么意思
例如:Old people must be spoken to politely.
be+过去分词是被动语态,那么to politely是什么意思.

be+过去分词+to+副词是什么意思例如:Old people must be spoken to politely.be+过去分词是被动语态,那么to politely是什么意思.
主动语态应该是 speak to old people politely.
所以变成被动式就是Old people must be spoken to politely.
speak to是词组 不是to politely.