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有关主谓一致的问题当类似于knife and fork这样的词组作主语时,谓语动词用单数.请问当knife and fo

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有关主谓一致的问题
当类似于knife and fork这样的词组作主语时,谓语动词用单数.请问当knife and fork 交换位置时,还一样吗?
位置交换要看换后那个名词是单数还是复数了
一、最基本的"主谓一致"规则  初中课本中最基本的"主谓一致"规则是:"单则单,复则复",即主语为单数时,谓语动词也用相应的单数形式;主语为复数时,谓语动词也用相应的复数形式.例如:I am a teacher.We are teachers.  但要注意:当表示时间、长度、距离、金钱、度量等词组作主语时,常将其看作是一个整体,谓语动词要用单数形式.例如:Two years is quite a long time.Ten dollars is enough.另外,加减乘除也常当作整体对待,谓语动词也用单数形式.例如:Forty-one plus fifty-nine is one hundred.How much is ninety-nine minus sixty-two?  二、集体名词作主语时,谓语动词的使用  family,class,team等集体名词作主语时,若指一个整体,谓语动词用单数形式;但若指其成员时,谓语动词用复数形式.例如:The family is very big.Their family are watching TV now.  三、neither...nor...,either...or...,not...but...,not only...but also...等连词连接两个主语时,谓语动词的使用  这些连词连接两个名词(或代词)作主语时,谓语动词要与靠近它的主语一致.例如:Neither he nor I know anything about it.Not only the students but also the teacher has visited the museum.  there be…结构也属于此类.例如:There is a teacher?蒺s desk,a blackboard,some desks and some chairs in the classroom.但要注意:both…and…表示"……和……都",谓语动词一般用复数形式.例如:Both his father and mother are doctors.  四、两个主语用and连接时,谓语动词的使用  and连接两个名词(或代词)作主语时,谓语动词一般用复数形式.例如:Mary and Helen are good friends.但要注意:and连接的两个名词只表示一个概念时,谓语动词要用单数形式.例如:A singer and dancer is coming.一个歌手兼舞蹈家就要来了.  五、politics,physics,works,the United States,news,maths等词作主语时,谓语动词的使用  这类形式上为复数,意义上却是单数的名词作主语时,谓语动词用单数形式.例如:The news is very exciting.Physics is a bit difficult for me.但要注意有些名词,如:people(人;人们),police等则是形式为单数,意义是复数,谓语动词要用复数形式.例如:People there are very friendly.  六、不定代词作主语时,谓语动词的使用  1.something,everything,anything,nothing,everybody,anybody,nobody,everyone,anyone等复合不定代词,以及either,neither(neither of),each (each of),each one,no one,another等代词作主语时,谓语动词用单数形式.例如:Neither of the answers is right.Something is wrong with my computer.  2.both,few,a few,many,several,others作主语,或它们所修饰的名词作主语时,谓语动词要用复数形式.例如:A few people can live to 100,but few can live to 150.Both of them are in my class.  七、with,as well as,like等修饰的单数名词作主语,谓语动词的使用  单数名词作主语,且后面有with,as well as,like等修饰时,谓语动词用单数形式.例如:The teacher with his students has gone to the library.Is the woman like you your mother?The instrument as well as other spare parts is going to be airlifted soon.(该仪器以及其它一些备用件不久将空运.)  八、动词不定式(或动词不定式短语),V-ing形式以及名词性从句作主语,谓语动词的使用  动词不定式(或动词不定式短语),V-ing形式以及名词性从句作主语,谓语动词用单数形式.例如:To eat in a fast food restaurant is cheap and saves time.Climbing hills is good exercise.What interests the workers most is better wages and working conditions.
你所说的就是第四点了,有的固定的短语用的是IS,还有:以下用法
1 并列结构作主语时谓语用复数 2 主谓一致中的就近原则 3 谓语动词与前面的主语一致 4 谓语需用单数 5 指代意义决定谓语的单复数 6 与后接名词或代词保持一致  7 the+形容词/国籍形容词.表示一类人/一国人,作主语,谓语动词用复数.  8 the+姓氏的复数,表示一家人或两夫妇,作主语时,谓语动词用复数,  9 四则运算时,谓语动词用单数.  10 表示,(时间,距离,重量,金额,书名)的复数名词作主语时,通常当做整体看待,谓语动词用单数.下面这个网址里有很祥的,把你需要的抄上就行了,有很多是大学里的,http://baike.baidu.com/view/84523.html?