The medicine must be kept cool不是说系动词没有被动语态吗
The medicine must be kept cool不是说系动词没有被动语态吗
Water must be kept from running away.这里面keep系动词不是无被动语态会进行时态吗
the room must be kept wet.变成被动语态!
I don't know.Must the medicine be kept cool,clean and dry?合并
our room must be kept clean.中的keep不是系动词么,怎么用被动态
animals kept in cages are not really happy为什么没有be 不是被动语态吗 为什
The medicine must be kept away from children
被动语态可以没有be动词?
被动语态怎么没有be动词呢?
there must be 有被动语态吗
must be是被动语态吗
英语的被动语态不是:be动词+过去分词吗?那下面这句话怎么是被动语态呢?I hear the song sung by