not…until的意思是直到...才，在...以前不。Not until可接延續(xù)性動詞和暫短性動詞。當(dāng)Notuntil位于句首時(shí)，句子要倒裝，其結(jié)構(gòu)為:Not until+從句/表時(shí)間的詞+助動詞+(主句)主語+謂語。

not...until的強(qiáng)調(diào)句結(jié)構(gòu)

強(qiáng)調(diào)句結(jié)構(gòu)：It is / was not until+從句/表時(shí)間的詞+that+主句

1、not until 后邊一般是時(shí)間點(diǎn)，如：

It was not until midnight that it stopped raining. 直到半夜雨才停下來。

It was not until five o'clock in the afternoon that they finished their work. 直到下午五點(diǎn)他們才完成工作。

2、not until 后邊也可以是陳述的句子，如：

It was not until he came to China that he realized the great change in recent decades. 直到他來到中國，他才意識到最近幾十年的巨大變化。

It was not until he got sick seriously that he realized the value of a healthy body. 直到他生重病，他才意識到一個(gè)健康體魄的價(jià)值。

3、not until 后邊還可跟介詞短語，如：

It was not until after Friday that I got his reply. 直到星期五之后，我才得到他的答復(fù)。

not...until的倒裝句結(jié)構(gòu)

倒裝句結(jié)構(gòu)：Not until+從句+倒轉(zhuǎn)的主句（主倒從不倒）

not until 引起的時(shí)間狀語置于句首時(shí)，句子的主謂應(yīng)部分倒裝。由 not until 引導(dǎo)的時(shí)間狀語從句位于句首時(shí)，主句應(yīng)部分倒裝，從句語序不變。

例句：

Not until 1998 did he return to his hometown.

直到 1998 年他才回到家鄉(xiāng)。

Not until Father came back did we begin to have supper last night.

昨晚直到父親回來,我們才開始吃晚飯。