主谓一致。
并列结构作主语时谓语用复数。
reading and writing are very important.
注意：当主语由and连结时，如果它表示一个单一的概念，即指同一人或同一物时，谓语动词用单数，and 此时连接的两个词前只有一个冠词。
the iron and steel industry is very important to our life.
主谓一致中的就近原则。
当there be 句型的主语是一系列事物时，谓语应与最邻近的主语保持一致。
there is a pen, a knife and several books on the desk..
当either… or… 与neither… nor， 连接两个主语时，谓语动词与最邻近的主语保持一致。
如果句子是由here, there引导，而主语又不止一个时，谓语通常也和最邻近的主语一致。
either you or she is to go.
here is a pen, a few envelops and some ***** for you.
谓语动词与前面的主语一致。
当主语后面跟有with, together with, like, except, but, no less than, as well as 等词引起的短语时，谓语动词与前面的主语一致。
the teacher together with some students is visiting the factory.
he as well as i wants to go boating.
谓语需用单数的情况。
代词each和由every, some, no, any等构成的复合代词作主语，或主语中含有each, every, 谓语需用单数。
each of us has a tape-recorder.
there is something wrong with my watch.
当主语是一本书或一条格言时，谓语动词常用单数。
the arabian nights is a book known to lovers of english.
《天方夜谭》是英语爱好者熟悉的一本好书。
表示金钱，时间，距离， **或度量衡的复合名词作主语。
时，通常把这些名词看作一个整体，谓语一般用单数。(用复数也可，意思不变。)
three weeks was allowed for ****** the necessary preparations.
ten million dollars is a big sum of money.
指代意义决定谓语的单复数。
在代词what, which, who, none, some, any, more, most, all等词的单复数由其指代的词的单复数决定。
all is right. (一切顺利。)
all are present. (所有人都到齐了。)
集体名词作主语时，谓语的数要根据主语的意思来决定。如family, audience, crew, crowd, class, company, committee等词后用复数形式时，意为这个集体中的各个成员，用单数时表示该个集体。
his family isn't very large. his family are music lovers.
但集合名词people, police, cattle, poultry等在任何情况下都用复数形式。
are there any police around?
3）有些名词，如variety, number, population, proportion, majority 等有时看作单数，有时看作复数。
a number of +名词复数+复数动词。
the number of +名词复数+单数动词。
a number of books h**e lent out.
the majority of the students like english.
与后接名词或代词保持一致。
用half of, part of, most of, a portion of 等词引起主语时，动词通常与of后面的名词，代词保持一致。
most of his money is spent on books.
most of the students are taking an active part in sports.
在一些短语，如 many a 或 more than one 所修饰的词作主语时，谓语动词多用单数形式。但由more than… of 作主语时，动词应与其后的名词或代词保持一致。
many a person has read the novel. 许多人都读过这本书。
more than 60 percent of the students are from the city.百分之六十多的学生都来自这个城市。
反义疑问句。
1) 陈述部分的主语是i，疑问部分要用 aren't i.
i'm as tall as your brother，aren't i?
2) 陈述部分的谓语是wish，疑问部分要用may +主语。
i wish to h**e a word with you, may i?
3) 陈述部分用 no, nothing, nobody, never, few, seldom, hardly, rarely, little等否定含义的词时，疑问部分用肯定含义。
the made no answer, did he / she?
some plants never blown (开花), do they ?
4) 含有ought to 的反意疑问句，陈述部分是肯定的，疑问部分用shouldn't / oughtn't +主语。
he ought to know what to do, oughtn't he? /shouldn't he?
5) 陈述部分有h**e to +v. (had to + v.)，疑问部分常用don't +主语（didn't +主语）。
we h**e to get there at eight tomorrow, don't we?
6) 陈述部分的谓语是used to 时，疑问部分用didn't +主语或 usedn't +主语。
he used to take pictures there, didn't he? /usedn't he?
7) 陈述部分有had better + v. 疑问句部分用hadn't you?
you'd better read it by yourself, hadn't you?
8) 陈述部分有would rather +v.，疑问部分多用 wouldn't +主语。
he would rather read it ten times than recite it, wouldn't he?
9) 陈述部分有you'd like to +v. 疑问部分用wouldn't +主语。
you'd like to go with me, wouldn't you?
10) 陈述部分有must 的疑问句，疑问部分根据实际情况而定。
he must be a doctor, isn't he?
you must h**e studied english for three years, h**en't you? /didn't you?
he must h**e finished it yesterday, didn't he?
11) 感叹句中，疑问部分用be +主语。
what colours, aren't they?
what a smell, isn't it?
12) 陈述部分由neither… nor, either… or 连接的并列主语时，疑问部分根据其实际逻辑意义而定。
neither you nor i am engineer, are we?
13) 陈述部分主语是指示代词或不定代词everything, that, nothing, this, 疑问部分主语用it。
everything is ready, isn't it?
陈述部分为主语从句或并列复合句，疑问部分有三种情况：
a. 并列复合句疑问部分，谓语动词根据邻近从句的谓语而定。
mr. smith had been to beijing for several times, he should h**e been in china now, shouldn't he?
b. 带有定语从句，宾语从句的主从复合句，疑问部分谓语根据主句的谓语而定：
he is not the man who g**e us a talk, is he?
he said he wanted to visit japan, didn't he?
c. 上述部分主句谓语是think, believe, expect, suppose, imagine等引导的定语从句，疑问部分与宾语从句相对应构成反意疑问句。
i don't think he is bright, is he?
we believe she can do it better, can't she?
15) 陈述部分主语是不定代词everybody, anyone, somebody, nobody, no one等，疑问部分常用复数they，有时也用单数he。
everyone knows the answer, don't they? (does he?)
nobody knows about it, do they? (does he?)
16) 带情态动词dare或need的反意疑问句，疑问部分常用 need (dare ) 主语。
we need not do it again, need we ?
he dare not say so, dare you?
当dare, need 为实义动词时，疑问部分用助动词do + 主语。
she doesn't dare to go home alone, does she?
17) 省去主语的祈使句的反意疑问句，疑问部分用will you。
don't do that again, will you?
go with me, will you / won't you ?
注意： let's 开头的祈使句，后用shall we?
let us 开头的祈使句，后用will you?
let's go and listen to the music, shall we?
let us wait for you in the reading-room, will you ?
18) 陈述部分是"there be"结构的，疑问部分用there省略主语代词。
there is something wrong with your watch, isn't there?
there will not be any trouble, will there?
19) 否定前缀不能视为否定词，其反意疑问句仍用否定形式。
it is impossible, isn't it?
he is not unkind to his classmates, is he?
20) must在表"推测"时，根据其推测的情况来确定反意疑问句。
he must be there now, isn't he?
it must be going to rain tomorrow, won't it?
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