英语中关于If的用法问题Eggs can remain fresh if refrigerated with solid carbon dioxide.这句话当中if后接短语的用法不是能够特别理解,请教下这种用法具体规则.

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英语中关于If的用法问题Eggs can remain fresh if refrigerated with solid carbon dioxide.这句话当中if后接短语的用法不是能够特别理解,请教下这种用法具体规则.
英语中关于If的用法问题
Eggs can remain fresh if refrigerated with solid carbon dioxide.
这句话当中if后接短语的用法不是能够特别理解,请教下这种用法具体规则.

英语中关于If的用法问题Eggs can remain fresh if refrigerated with solid carbon dioxide.这句话当中if后接短语的用法不是能够特别理解,请教下这种用法具体规则.
if引导条件状语从句,当条件状语从句中的主语和主句中的主语一样时,可省略从句中的主语及谓语.以你说的这句话为例,eggs既是主句的主语又是从句中的主语所以省略从句中的主语eggs及谓语are

if
AHD:[¹f]
D.J.[if]
K.K.[!f]
conj.(连接词)
In the event that:
如果,倘若:在…的情况下:
If I were to go, I would be late.
倘若我去,就要迟到
Granting that:
假设,如果:
If that is...

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if
AHD:[¹f]
D.J.[if]
K.K.[!f]
conj.(连接词)
In the event that:
如果,倘若:在…的情况下:
If I were to go, I would be late.
倘若我去,就要迟到
Granting that:
假设,如果:
If that is true, what should we do?
假设那是真的我们该怎么办呢?
On the condition that:
如果,只要:在某种条件下:
She will play the piano only if she is paid.
只有付给她报酬,她才愿意演奏钢琴
Although possibly; even though:
虽然;即使:
It is a handsome if useless trinket.
虽然无用却很漂亮的小饰物
Whether:
是否:
Ask if he plans to come to the meeting.
问问他是否要来参加会议
Used to introduce an exclamatory clause, indicating a wish:
但愿,要是…该多好啊:用来引出一个表达愿望的感叹句,表达一个愿望:
If they had only come earlier!
如果他们早来一步该多好啊!
n.(名词)
A possibility, condition, or stipulation:
条件:可能性、条件或设想:
There will be no ifs, ands, or buts in this matter.
这件事不允许有假设、拖延或反对

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