as long as 与only if 辨析，as long as 与only if 的用法区别，as long as,单词记忆法、语法用法、单词意思，与as long as, 相关例句、名人名言-用法辨析

知识点1:as long as 与only if 辨析[1]long单词记忆法

◆记忆方法一：联想方式： long:龙一条长长的龙◆记忆方法二：联想方式： long:龙记忆方法：一条长长的龙

as long as 与only if 辨析，as long as 与only if 的用法区别，as long as,单词记忆法、语法用法、单词意思，与as long as, 相关例句、名人名言-用法辨析

在许多情况下，as long as 与 only if 均可用，只是语气有强弱之分。但是，当主句和从句的谓语动词均为短暂性动词时，通常只用 only if，而不用 as long as。如：[2]谓语动词,动词,相关知识点

谓语动词切忌用“行为动词1 + 原形动词”、“be + 原形动词”。○4have+过去分词。如：Many trees have been cut down since 1970s.（意思同上）○5般时问句和否定句中：do/does/did+原形动词。如：He does not enjoy himself very much.（他日子过的不好。）Did any of you se

你只有请他，他才会来。
误：He will come as long as you ask him.
正：He will come only if you ask him.
析：此句中的 only if 不能用 as long as 代替，因为动词 ask 与 come 均短暂性动词。[3]come单词记忆法

◆记忆方法一：联想方式：c：月亮；o：呼啦圈；me:我月亮转着呼啦圈来到我的面前◆记忆方法二：联想方式：c：月亮；o：呼啦圈；me:我记忆方法：月亮转着呼啦圈来到我的面前

四、词序上的差别
两者均可引导从句置于主句之后，也可置于主句之前。但是，当only if 引导的状语从句置于主句之前时，其后的主句要用倒装语序，而且 as long as 引导的从句置于主句之前不用倒装。如：
As long as it doesn't rain we can play. 只要不下雨，我们就能玩。
As long as you're happy, it doesn't matter what you do. 只要你高兴，你做什么都没关系。
Only if a teacher has given permission is a student allowed to enter this room. 只有得到教师的允许，学生才可以进这间屋。
Only if the red light comes on is there any danger to employees. 只要红灯一亮，就表示有危及职工的险情。[4]employee单词记忆法

◆记忆方法一：词根词缀记忆法：employee n 雇员（employ雇用）,-ee表名词，“被动或主动的人”

五、注意 only if 与 if only 的差别
only if 意为“只要”，可视为 if 的加强说法。而 if only 有两个意思，一是表示“只要”，此时通常与陈述语气连用，与 only if 用法相似；二是表示“但愿”“要是……就好了”，此时多与虚拟语气连用。如：[5]if only,虚拟语气,相关知识点

If only和as if所引出的虚拟语气用法注：从句所表示的内容若为事实或可能为事实，也可用陈述语气：It looks as if we’ll be late. 我们似乎要迟到了。This meat tastes as if it has already gone bad. 这肉吃起来似乎已经坏了。在现代英语中，有时即使从句内容不是事实，也可能用陈述语气。如如：I feel

I will come only if you promise not to invite Mary. 只要你答应不请玛丽，我就来。
If only it clears up, we'll go. 只要天晴，我们就去。
If only I was rich. 要是我很有钱就好了。
If only I hadn't told him about it. 要是我没有告诉他这事就好了。
It's a good plan, if only we could carry it out. 那是个不错的计划，但愿我们能实现它。

知识点2:as long as 与only if 辨析
as long as 与only if 辨析，as long as 与only if 的用法区别，as long as,单词记忆法、语法用法、单词意思，与as long as, 相关例句、名人名言-用法辨析

The coach stops at the principal hotels to pick up tourists, but only if they arrange this in advance. 大客车到各主要的旅馆来接观光者，但条件是必须事先安排好。
三、动词搭配上的差别
在许多情况下，as long as 与 only if 均可用，只是语气有强弱之分。但是，当主句和从句的谓语动词均为短暂性动词时，通常只用 only if，而不用 as long as。如：[6]从句,动词,相关知识点

在“动词+宾语+宾补”结构中,如果宾语是不定式、动名词、宾语从句,则常用it做形式宾语,而将实际的宾语移到补语后面去。如：I found the job rather difficult. (我发觉这个工作相当难做。)I found it rather difficult to do the job.

你只有请他，他才会来。
误：He will come as long as you ask him.
正：He will come only if you ask him.
析：此句中的 only if 不能用 as long as 代替，因为动词 ask 与 come 均短暂性动词。
四、词序上的差别
两者均可引导从句置于主句之后，也可置于主句之前。但是，当only if 引导的状语从句置于主句之前时，其后的主句要用倒装语序，而且 as long as 引导的从句置于主句之前不用倒装。如：
As long as it doesn’t rain we can play. 只要不下雨，我们就能玩。
As long as you’re happy, it doesn’t matter what you do. 只要你高兴，你做什么都没关系。
Only if a teacher has given permission is a student allowed to enter this room. 只有得到教师的允许，学生才可以进这间屋。
Only if the red light comes on is there any danger to employees. 只要红灯一亮，就表示有危及职工的险情。
五、注意 only if 与 if only 的差别
only if 意为“只要”，可视为 if 的加强说法。而 if only 有两个意思，一是表示“只要”，此时通常与陈述语气连用，与 only if 用法相似；二是表示“但愿”“要是……就好了”，此时多与虚拟语气连用。如：[7]虚拟语气,用法,相关知识点

一些“should ＋动词原形”虚拟语气的用法2．在名词suggestion, order, proposal, plan, desire, request, decision, idea, advice等之后接表语从句或同位语从句时，也应该用“should ＋动词原形”。如：1)The decision that we should build another new s

as long as,单词记忆法

as long as相关单词意思与记忆法：
as long as单词意思解释释义：
只要...

与as long as, 相关的例句或者名人名言

as long as单词相关例句：
A man is not old as long as he is seeking something. A man is not old until regrets take the place of dreams. (J. Barrymore)—— 只要一个人还有追求，他就没有老。直到后悔取代了梦想，一个人才算老。（巴里摩尔）

Many areas and work units have experienced no recidivism at all for as long as ten or more years.

不少地区和单位出现了连续几年、十几年没有发生重新犯罪的好典型。

I'll stay in Mexico as long as my money holds on.

只要我的钱还能维持一天，我就在墨西哥待一天。

You can stay here as long as you don't make a noise.

假若你不造成噪音滋扰，就可留在这里。

Rootstock flagellate. Leaflets not 2-pinnatifid, narrowly lanceolate, ca. 5 × as long as wide, apex long caudate-acuminate.

根茎具鞭状匍匐枝。小叶并非2羽状半裂，狭披针形，长约宽的5倍，先端长尾状渐尖。

Many people think that it is wrong to incarcerate criminals in confined quarters for as long as thirty years.

很多人认为把罪犯监禁在禁闭营里达30年之久是不对的。

The instrument to write with can be anything, (e. g. cosmetics, blood, etc) as long as it can write directly onto the note and remains as legible letters.

写作工具可以是任何物品（如化妆品，血，等等）只要能直接写在笔记上并留有清晰的字迹就可以了。

Whether one lives in his home as a grhastha or in the forest as a renunciate, as long as he exclaims, "Ha Gauranga! ""

无论是在家的居士还是在森林里的弃绝者，他只要高呼：“哈，高浪伽！”

Time like hardly using up dentifrice, as long as you crush it , it must have a little!

时间就像快用完的牙膏，只要你去挤，总还有一点。

There's another way to look at obsolescence as well: No technological product is obsolete as long as it continues to perform the job for which you originally purchased it.

从另一个角度来看待这些废弃品：只要它还能继续正常工作就像刚购买时一样，那么任何一种科技产品都不会被淘汰。