用must be done 和must be doing 造句

Question

顺便要解释下子意思哈 谢谢!
再加个 as a result

Answer 1

you must have completed the job!你一定已经做完了工作了吧？
You must be doing the job!你一定还在做那个工作吧

Answer 2

He must be killed. 他一定被杀了 是被动语态

He must be playing baskeyball at playground. 他现在一定在操场打球
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Answer 3

must
have
done和must
have
been
doing的区别：
您好。两者都是表示肯定的推测。
must
have
done：是说你肯定做了某事。
must
have
been
doing：译为肯定当时正在做某事，只有意思的区别。

Answer 4

Finding a boyfriend is what must be done for you right now.
找个男朋友对你来说是当务之急。

What you must be doing is taking care of your kids.
照顾孩子是你必须做的事情。