我以前没有去过纽约，简也没去过。
她没有大惊小怪—她以前全都见识过。
我确信车盖上有一个以前没有的凹痕。
I was convinced there was a dent in the hood which hadn't been there before.
没有声音，但与以前不一样。
19世纪以前，几乎没有社会流动的渠道。
Prior to the nineteenth century, there were almost no channels of social mobility.
虽然我像以前一样努力工作，但我没有感到疲惫。
没有——不过我想说，还是像我们以前那样，晚上来吧——这样好些。
No--but I'd say come in the night as we used to do--it's better.
以前没有桥。想去岛上只能走水路。
There was no bridge before. And the island could only be reached by water.
她以前没有想到这一点。
以前没有需求，所以一切研究停留在实验室阶段。
There was no demand before, so all the research stayed in the laboratory.
玛丽以前没有注意到，现在她一抬头就看到了它。
Mary had not noticed it before, but she looked up and saw it.
这里以前没有恐龙。
那里以前没有池塘！
以前这里没有秋千。
这不是以前没有发生过的。
我们以前从来没有这么多工厂。
灌木的大小增加了，以及灌木的覆盖范围扩展到以前没有灌木的苔原上。
The size of the shrubs has increased and shrub cover has spread to what was previously shrub-free tundra.
我记得以前11月的天气没有那么炎热干燥。
I don't remember it ever being so hot and dry in November before.
就连这位国务卿助理也不得不承认以前的政策,用他本人的话说,没有产生效果。
Even the Assistant Secretary of State had to admit that previous policy did not, in his words, produce results.
以前没有多少人走过这条小路。
你以前从来没有到过这一地区？那么你一定会喜之不尽。
You've never been to this area before? Then you're in for a real treat.
她以前从来没有碰到过这样的恶意和狭隘。
企业以前从来没有同时应付过战争和经济衰退。
Never before has the industry had to cope with war and recession at the same time.
母语使用者可以分辨符合语法规则和不符合语法规则的句子，即使他们以前从没有听过这些特定的词语组合。
Native speakers can distinguish between grammatical and ungrammatical sentences even when they have never heard particular combinations before.
我以前没有上过音乐课。
你知道吗，我以前从来没有坐过船。
Do you know, I've never been in a boat before in all my life.
我以前从来没有观察过东西，这让我感到很好奇。
I had never watched things before and it made me feel very curious.
这是我最后一节法语课，我后悔以前没有好好学习。
It was my last French lesson, and I regretted not studying hard before.
以前这儿没有池塘。
她以前没有这么演唱过。
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