coredata的relationship里的Inverse到底是什么意思

inverse的意思是倒装或倒置，在这里表示数据库中的两个表是倒置关系。

倒装可以分为部分倒装和完全倒装两种，完全倒装是把谓语动词全移到主语之前，部分倒装只把助动词、情态动词、be动词提到主语的前面去。

一、部分倒装。

部分倒装的情况可以分为三种。

否定词或only加状语放在句首。

Never is he late for school
Rarely does he tell a joke
Never have I seen such beautiful scenery
Hardly had I sat in the chair when someone knocked at the door
No sooner had he reached his house than it began to rain
Not only does he draw illustrations, but he also writes novels
Under no circumstances will China use nuclear weapons first
Not until I talked to her, did I know that she was homesick
No hope did I have at that time
Not a word did my father say
Only in direct communication, is there mutual activity
If you don't go tomorrow, neither will I
I haven't visited the North Pole, nor do I plan to

程度副词放在句首。
Well do I remember the promise you made last year
So beautiful is Anne that I fell in love with her
Such a boring lecture was it that half the students fell asleep

副词so放在句首。
I often donate money to charity, and so does my wife
She spent the whole evening watching TV, and so did her sister
但是，注意下面的句子。
The greatest gift that we have is our health, and so it is

二、完全倒装。

完全倒装可以分为以下两种：

表示地点的状语、过去分词、现在分词、不定式放在句首：

Here comes the teacher
Here she comes
Over the wall came a shower of stones
Standing at the door was a man with a gun
Suspended on the ceiling is a beautiful light
First to unfold was the map

表语放在句首：
Happy is the country that has no war
Faint grew the sound of the bell
Right you are
Happy he is

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