Only in your own heart can you find the true peace.
表示否定意义的副词或连词放在句首时的部分倒装
not, little, hardly, never, no sooner...than..., hardly/scarcely...when..., not only...but also..., at no time, by no means, on no condition, in no case, in no event, nowhere, seldom等。
Never once have the old couple quarreled with each other since they were married 40 years ago.助动词have提到主语前
Seldom do I go out alone in the evening. 代词go是实义动词，补助动词do。如果是went就提炼did。如果是三单就是does
Little did she care about her own safety，though she herself was in great danger.
so...that...的so出现于句首时的部分倒装
在 so...that...句式中，如果 so 引导的部分前置，主句中的主语和谓语需用部分倒装。
so……that……的本质就是结果状语从句，that后面就是从句，so……是主句
So carelessly did he drive that he almost killed himself.
he drove so carelessly that……
So fast do you speak that I can hardly follow you.
So badly was he injured in the car accident that he had to stay in hospital for a few months.
You are the very person who gives me a hand when (it is) necessary.
Arrest them, if (it is) necessary.
主谓一致
即主语和谓语在“人称和“数”方面的一致关系。
语法一致
从句，不定式，动名词作主语视为单数
To see is to believe.
Watching basketball games has become my hobby.
Whether she will go abroad or not is not decided.
由and或 both，and连接的并列主语,谓语动词用复数
Jack and Henry are best friends
Both Mary and Linda were satisfied with the new tutor。
被 as well as（和/也），with, along with, together with等短语修饰的主语
as well as, with, along with, like, together with, rather than, except, but, including, accompanied by, plus, besides, in addition to, no less than等引起的结构跟在主语后面,不能看作并列主语。
The film stars, accompanied by their assistants,were seen to enter the hotel.
Mr. White, as well as his wife and children, has gone to London last Friday.
主语含义上虽为复数形式上为单数,谓语仍用单数形式
有些主语被 many a, more than one，each, every或no修饰,虽为复数意义,谓语动词也用单数形式。
Many a student is going to take part in the English contest.
Every boy and every girl has the right to receive education in that country.
某些不定代词作主语,谓语动词一般用单数形式。
此类不定代词有: either, neither，each，one, the other, another, somebody, someone ， something, anyone, anything, anybody, everyone, everything, everybody, no one, nothing，nobody等。
Everything around us is matter.
Someone has let the news out.
意义一致
Seven days is enough for completing this task .
七天是一个概念
1000 dollars was a lot of money for me at that time.
My family is a big one.
My family are fond of going out for a walk after supper.
Over 80 percent of the water goes into the air. 看of后面的，水是物质，三单
One third of the employees in that company are no more than thirty years old.员工是复数，用are
