in order that或that之后只限跟may/shall或它们的过去式。
that除在戏剧、诗歌及文章中外极少单独使用。
关于时态一致的规定与上文所述相同。下文的句子是很正式的:
We carved their names on the stone so that/in order that future genera- tions should/might know what they had done.
我们把他们的名字刻在石头上,为的是让后代们知道他们的事迹。
These men risk their lives so that/in order that we may live more safely.
这些人甘冒生命危险,为的是让我们生活更安全。
在一般现在时中may比shall更常见,shall现已很少用。但在一般过去时中might或should都可使用。对上述形式要有所了解,但并不见得需要用,因为在一般情况下,用so that+ can/could或will/would就足够了。
C 表示否定目的的从句由助动词(will/would或should)变为否定式构成:
He wrote his diary in code so that his wife wouldnt be able to read it.
为了不让妻子看懂,他用密码写日记。
He changed his name so that his new friends wouldnt/shouldnt know that he had once been accused of murder.
为了不让新朋友们知道他曾被控犯有谋杀罪,他改了名字。
【牛津实用英语语法:336 目的从句】相关文章:
★ 牛津实用英语语法:347 so和not可替代that从句
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