Conversion is a way of word formation in which a word belonging to one word class is converted into another category without any change in form.
A. 对
B. 错
"He hammered the nail into the wall" means"He hit the nail into the wall with a hammer."
A. 对
B. 错
Conversion can happen between nouns and verbs.
A. 对
B. 错
A prototypical action involves an agent, recipient, instrument, manner and result.
A. 对
B. 错