将下列主动句改为被动句:1.Theworkerscouldnotfindthemanageranywhereinthefactory.2.Thearmyengineersandsoildershavebuiltabridgeovertheriver.3.Youmustcleanyourwatchonceayear.4.XiaoWangcoulddothejob5.Icannot
ager anywhere in the factory.
2.The army engineers and soilders have built a bridge over the river.
3.You must clean your watch once a year.
4.Xiao Wang could do the job
5.I can not find mydictionary.Someone has taken it.
The manager could not be found anywhere in the factory by the workers.
A bridge has been built over the river by the army engineers and soldiers.
Your watch must be cleaned by yourself once a year.
The job could be done by Xiao Wang.
My dictionary can not be found.It has been taken.
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