before long / long before

1. before long 意为“不久以后”，

2. long before 意为“很久以前”，

how long / how often / how soon / how far / how many times

1. how long 意为“多久；多长时间”， 常对时间段提问，常用“for+一段时间”或“since +时间点”、“since +时间段+ ago”、“since引导的时间状语从句”来回答

2. how often 意为“多久一次”， 对频率提问 其答语常用“once (twice/...)+时间段”，always，often等频度副词(短语)

3. how soon 意为“多久以后”， 对“in+时间段”提问，常用于一般将来时的句子中 其答语常用“in + 时间段”

4. how far 意为“多远”， 对距离提问 其答语是表距离的数量

5. how many times 意为“多少次”， 用于询问次数，可用once，twice，three times等回答

not ... anymore / not ... any longer 意为“不再”

1. not ... anymore 相当于no more，表示数量和程度上的“不再” ，通常修饰非延续性动词，一般指今后“不再”，故多用于将来时

2. not ... any longer 相当于no longer，指时间或距离上的“不再延长” 通常修饰延续性动词，多指现在的情况与过去相比，故常用于现在时

全部

1·How long will the flight take?

此次航班将飞行多长时间？《牛津词典》

2·She usually wears long skirts.

她通常穿长裙。《牛津词典》

3·How long have you been married?

你结婚多长时间了？《牛津词典》

4·I don't intend staying long.

我不打算长期逗留。《牛津词典》

5·How long does the play last?

那出戏要演多长时间？《牛津词典》

6·The bureaucrats dallied too long.

官僚们延误了太长时间。《柯林斯英汉双解大词典》

7·The table is six feet long.

那张桌子长六英尺。《牛津词典》

8·Have you been waiting long?

你等了很长时间吗？《牛津词典》

9·The long blades clashed together.

长刀相击铿然作响。《牛津词典》

10·The long journey tired him.

漫长的旅程使他疲倦。《柯林斯英汉双解大词典》

长

1·Doctors often work very long hours.

医生经常长时间工作。《牛津词典》

2·The oil slick is now 35 miles long.

这层浮油目前长35英里。《柯林斯英汉双解大词典》

3·She wore her hair in a long braid.

她留着长辫子。《柯林斯英汉双解大词典》

4·I think it's only three weeks long.

我想只有三个星期长。《牛津词典》

5·He uses a lot of long words.

他使用了很多长词。《牛津词典》

久

1·It was on TV not (so) long ago.

电视不（很）久以前播出了这个节目。《牛津词典》

2·The reservoir was low after the long drought.

久旱之后水库的水位下降了。《牛津词典》

3·The prospect of a long wait in the rain did not appeal.

想到要在雨中久等使人扫兴。《牛津词典》

4·If you keep a medicine too long, it may lose its potency.

药物存放太久，可能会失去效力。《牛津词典》

5·It's disgraceful that they have detained him for so long.

真是可耻，他们扣押了他这么久。《柯林斯英汉双解大词典》

长时间

1·The bureaucrats dallied too long.

官僚们延误了太长时间。《柯林斯英汉双解大词典》

2·There was an awkwardly long silence.

有一段令人尴尬的长时间的沉默。《柯林斯英汉双解大词典》

3·Sorry I took so long.

对不起，我用了这么长时间。《柯林斯英汉双解大词典》

4·It's frustrating to have to wait so long.

要等这么长时间，真令人懊恼。《牛津词典》

5·Repairs to the cable did not take too long.

维修电缆没花太长时间。《柯林斯英汉双解大词典》

长长的

1·Sue has long dark hair.

苏留着长长的黑发。《牛津词典》

2·His long fingers splayed across her back.

他把长长的手指叉开贴在她背上。《牛津词典》

3·Her long black hair bounced as she walked.

她长长的黑发在她走路时摆动着。《柯林斯英汉双解大词典》

4·A long scream sounded from somewhere above.

从上面什么地方传来一声长长的尖叫。《柯林斯英汉双解大词典》

5·Her long fair hair was knotted and straggly.

她那长长的金发散乱而打结。《柯林斯英汉双解大词典》

悠久

1·It boasts a fairly long history.

它拥有相当悠久的历史。

2·Asia has long tradition of tea-drinking.

亚洲有饮茶的悠久传统。

3·Many of these crafts have long histories.

这些手工艺品大多都拥有悠久的历史。

4·The long history and colorful culture of China attract many foreigners to learn Chinese.

中国悠久的历史和丰富多彩的文化吸引了许多外国人学习汉语。

5·Aspergillus nidulans has a long history of use.

“构巢曲霉”有着悠久的使用历史。

长久的

1·We thought long and hard before deciding to move house.

我们经过长久慎重的考虑之后才决定搬家。《牛津词典》

2·What I really want is to live healthily for as long as possible.

我真正想要的是尽可能长久、健康地活着。《柯林斯英汉双解大词典》

3·He suffered a long series of illnesses with tremendous dignity and fortitude.

他在病魔的长久折磨下表现出了高度的尊严和刚毅。《柯林斯英汉双解大词典》

4·His inability to stay at one job for long had finally proved too much for her.

他干什么工作都不能长久，终于让她无法忍受。《柯林斯英汉双解大词典》

5·The administration knows that's their trump card and will keep playing it as long as they can.

政府知道那是他们的王牌，会尽可能长久地使用它。《柯林斯英汉双解大词典》

(1)no longer不再

(1)as long as只要；和…一样长

(1)long timeadj. 长期的（持久的）；长时间；好久好久

(1)for long长久

(1)for a long time很长时间，很久

(1)how long有多久