"They speak steadily."
Translation:Mereka berbicara dengan mantap.
can one say "mereka mantap berbicara"? Thank you. I saw similar structure in sentence "saya tidak mantap berdiri"
How is it that you can say "Dia tidak mantap berdiri" (the preceding exercise in this lesson) but you can't say "Mereka mantap berbicara"? In both cases, mantap is functioning as an adverb.