将下列主动语态改为被语态 1.you must clean your watch once a year.2.xiao wang could do the job.
问题描述：
将下列主动语态改为被语态 1.you must clean your watch once a year.2.xiao wang could do the job.
3.i can't find my dictionary.someone has taken it.
答
1.You must clean your watch once a year.
Your watch must be cleaned once a year.
2.Xiao Wang could do the job.
The job could be done by Xiao Wang.
3.I can't find my dictionary.Someone has taken it.
My dictionary can't be found.It has been taken by someone.