Lesson114
<grammar and vocabulary>
You must be rich to drive such a nice car.
I appreciate that.
<target forms>
You must be rich to drive such a nice car.
He must be brave to say such a thing.
You must be crazy to believe that.
Who are you to tell me what to do?
<grammar in action>
You must be crazy to think I'll agree. That idea will never work.
Allen says this is the best option. Who are you to question him?
That was a bold move. You must be very brave to do that. Or very foolish.