有一读者问：九年义务教育初中英语教材每册中都有两个复习单元，其标题是 Mainly revision。 mainly 是一副词，revision 是一名词，这样连用对吗？是否应将 mainly 改为 main?
mainly，以及 chiefly, especially, only, just, simply 等，在语法上叫做焦点副词（focus adverbs)（参见《朗文英语语法》第271—272页），其功能是凸显或令人集中注意其后的名词。Mainly revision 的意思是“大部分是复习”，故不应改为 main revision（主要的复习）。再如：
(1)I saw a queue of people, mainly children and old men.
(2)I like all of Lu Xun's works, especially The True Story of Ar Q .
(3)Only Steve plays the piano.
(4)It was simply a matter of time.
(5)He's just a boy.
