区分一下sth be supposed to do和sth be supposed to be done
问题描述：
区分一下sth be supposed to do和sth be supposed to be done
答
sth be supposed to do 是某事应该去做
sth be supposed to be done 是某事应该被做
答
区别在to do 和to be done 上，一个是应该去做，一个是应该做过
答
前者主动,后者被动.由于是STH,因此,主动的情况下应该较少.
The clock is supposed to work.钟当是正常的（能工作）.
The work is supposed to be done by Fri.
答
某物应该去做什么 某物应该被用作什么