請(qǐng)看題：By all _______,you must try every _______ to help him.A.mean,mean B.means,means C.means,mean D.mean,means【陷阱】誤選C,認(rèn)為第一空前有all修飾,故用means,而第二空前有every修飾,故用mean.【分析】其實(shí),means是一個(gè)單復(fù)數(shù)同形的名詞,并且永遠(yuǎn)帶有尾-s.換句話說,在表示“方式”、“方法”時(shí),不存在mean這一形式(mean主要用作動(dòng)詞,表示“意思是”；也可用作名詞,表示“中間”、“中庸”).此題正確答案為C,by all means為習(xí)語,意為“一定”、“盡一切辦法”.順便說一句,means用作主語時(shí),其謂語的數(shù)需根據(jù)句意來確定.比較：All possible means have been tried.所有可能的辦法都已經(jīng)試過了.Every possible means has been tried.每種可能的辦法都已經(jīng)試過了.若句意不能明確地表明主語的單復(fù)數(shù),其謂語則用單數(shù)或復(fù)數(shù)均可.如：Is [Are] there any other means of getting more money?還有其他什么辦法可弄到更多錢嗎?