Answer the following questions. Your answers should be clear and

Answer the following questions. Your answers should be clear and short.Please explain the difference between the following two examples from the viewpoint of word formation. (1) single (adjective) — single (verb) (2) simple (adjective) —simplify (verb)
【正确答案】：

THE FIRST INSTANCE IS A CASE OF ZERO-DERIVATION OR CONVERSION WHEREAS THE SECOND IS ONE OF SUFFIXATION.

【题目解析】：本题得分的关键在于答出零位派生法或转类法、后缀法。第一个例子是零位派生法或转类法。single这个词的形式不用变化，就可以做为动词使用。第二个例子是后缀法。simple这个词如果不加词缀的话，是不可以当做动词使用的。必须使用后缀法，在simple词尾加-ify，才可以做为动词使用。