Question

until与not.until用法上有什么不同

Answer 1

not … until,until
A.until表示动作、状态的持续,强调“一直到……为止”,或强调某个动作或状态一直持续到另一个动作或状态出现之前.常与表示延续性动作的动词连用.
如：* I waited until three o’clock,but he didn’t come.* He lived with his parents until he graduated from college.
B.not … until表示“到……为止；直到……才”,常与表示瞬间性动作的动词连用.
如：* The noise of the street didn’t stop until midnight.* The children didn’t come home until it was dark.* I didn’t know the truth until you told me.

Answer 2

until使用只与延续性动词比如eat，sing搭配，当动词是非延续性动词如open，close要用否定形式即not until

Answer 3

区别是：
until 用于肯定句中,表示句子的动作一直持续到until短语所表示的时间为止,即表示动作的终点.一般可译为“直到……时(为止)”或“在……以前”.在这种用法中,句子的谓语动词必须是持续动词(非瞬间动词)。

not until表示句子的动作直到until短语所表示的时间才开始发生，即表示动作的起点。一般译为“直到……才”或“直到……之前(……还不)”。

例句辨析：
until
1、I waited a long time until a script came along that I thought was genuinely funny

我等了很长时间，直到出现了一个我认为真正逗趣的剧本。
2、I have left my best wine until last.

我把最好的酒留到了最后。
3、We have extended the time limit for claims until July 30.

我们已经把索赔期限延长到了7月30日。

not until
1、It was not until 1911 that the first of the vitamins was identified.
直到1911年才发现了第一种维生素。
2、It was not until yesterday that I learned it.

顶昨天我才听说这件事。
3、It was not until 1974 that his ability to write gelled again.

直到1974年，他的写作才华才又得以发挥。