if,或whether,引导宾语从句，“是否”，放在动词ask, see, say, know, 和find out, 等后面。一般情况下，两者常可换用，在口语中多用if。

没有人知道明天是否下雨。 Nobody knows whether it will rain tomorrow,

Nobody knows if it will rain tomorrow,

if, 或whether, 不能和that, 或其他连词（副词）同时使用，也不能省去。

我不知道他今天是否会来。 I don't know if he will come here today,

 I don't know whether he will come here today,

if,或whether,引导的宾语从句时，虽具有疑问意义，但从句语序应用陈述句语序。

if,或whether,引导的宾语从句应和主句的时态保持一致。即主句为一般现在时，从句用任一种时态；主句为一般过去时，从句则用过去时中的任一种时态。

我不知道他是否来过这儿。 I don't know if he has come here,

I don't know whether he has come here,

在动词不定式之前只能用whether,。

我不能决定是否留下。 I can't decide whether to stay,

在whether,  or not,的固定搭配中。

我想知道是否是好消息。 I want to know whether it's good news or not,

在介词后，只能用whether,

他的父亲担心是否会失去工作。 His father is worried about whether he loses his work,

宾语从句放在句首表示强调时，只能用whether,  

他们是否能准时完成这项工作还是个问题。 Whether they can finish the work on time is still a problem,

用if,会引起歧义时，只用whether,。

Could you tell me if you know the answer?这句话有两种意思：“你能告诉我是否知道答案吗？”或“如果你知道答案，请告诉我，好吗？”。如用whether可避免歧义。

你能告诉我是否知道答案吗？ Could you tell me whether you know the answer?,

没问题，没毛病 Nothing is wrong with,

There isn't anything wrong with,

There's nothing wrong with,

某物穿在某人身上好看  something looks good on somebody,

 something looks nice on somebody,

somebody looks good in, + 颜色衣服 某人穿什么颜色的衣服好看  

你知道彩虹有多少颜色吗？ Do you know how many colours there are in a rainbow ? ,

宾语从句用陈述语序

影响我们的心情  influence our moods,

对  有影响 have an influence on,

使我们感到高兴  make us feel happy,

 使某人做某事；注意被动形式make somebody do something,

感到困倦 feel sleepy,

去睡觉 go to sleep,

(短暂性)入睡 fall asleep,

(延续性)睡着的 be asleep,

一个正在睡觉的男孩  a sleeping boy,

对  有好处  be good for,

对  有坏处  be bad for,

对  亲切 be good to,

擅长于be good at,

（人）感到放松  feel relaxed,

令人放松的电影 relaxing films,

被漆成蓝色  be painted blue,

 paint something + 颜色 把某物漆成  颜色

给我们的大脑和身体带来平静  bring peace to our mind and body,

代表伤心  represent sadness,

stand for sadness,

感到悲伤难过  feel blue,

feel sad,

在某人婚礼的那天  on one's wedding day,

宁愿,更喜欢 prefer,

preferred,

 like better,

宁愿做某事  prefer something,

prefer doing something,

prefer to do something,

宁愿某人做某事 prefer somebody to do something ,

宁愿某人不做某事 prefer somebody not to do something ,

 宁愿喜欢  而不愿喜欢  prefer something to something,

 宁愿做事情而不愿做事情 prefer to do something rather than do something,

 prefer doing something to doing something,

创造一种温暖而舒服的感觉  create a warm and comfortable feeling,

使某人高兴起来，某人振作起来  cheer somebody up,

make somebody happy,

使某人想起某事,提醒某人某事 remind somebody of something,

提醒某人做某事 cause somebody to remember something,

help somebody to remember something,

remind somebody to do something,

希望成功  hope for success,

在身体或精神上需要力量  require strength in either body or mind,

 要求某人做某事  require somebody to do something,

ask somebody to do something,

需要被做 (主动形式表示被动意义）  require doing,

need doing,

require to be done,

need to be done,

 make, 或者 find,或者think,或者feel, + it, 形式宾语+ for somebody,+ to do something, 对某人来说使或者发现或者认为或者觉得做某事怎么样。

我发现学好英语是困难的  I find it hard to learn English well,

做某事有困难 have difficulty doing something,

have difficulty in doing something,

have difficulty with something ,

类似的有：trouble,problems,

决定 make a decision,

决定做 make a decision to do something,

make up one's minds to do something,

make up one's mind to do something,

decide to do something,

颜色与心情之间的关系a relationship between colours and moods,

影响我们的日常生活（作定语） influence our everyday lives,

取决于个人的口味  depend on personal taste,

白色衣服适合我 white clothes suit me,

suit, 指颜色、款式、发型、时间、口味、气候、条 件、地位适合某人

绿色 T 恤和我的裤子搭配  the green T-shirt matches my trousers,

 与 搭配  match something very well,

 go well with something,

fit 往往强调尺寸、大小或形状上的吻合。

这件外套我穿起来很合身。 This coat fits me very well,

这鞋我穿不合适。你们有大点的吗？These shoes don't fit me, Have you got a larger size?,

这钥匙（与这锁孔的形状）不吻合。  The key doesn't fit well,

suit, 侧重于符合某人的口味，或服装颜色、款式等的相配或适合。

那种发型很适合你。 That haircut suits you,

这是一栋小房子，但它符合我们的需要。 It's a small house but it suits our needs,

好的教师根据学生的年龄来上课。A good teacher suits his lessons to the age of the students,

你适合穿蓝色（服装） 。 Blue suits you,

match,多指两个物体大小、色调、形状、性质等方面很相配，显得很协调。

地毯应该和窗帘相配。 The carpets should match the curtains,

这鞋子与我的衣服配吗？ Do these shoes match my dress?,

您的杯子和茶碟非常相配。 Your cups match your saucers,

match,指在能力、水平上“与  相配”。

在野生植物知识方面，你无法与他相比。 You can't match him in his knowledge of wild plants,

被用作庆祝活动 be used for celebrations,

古代欧洲统治者 the rulers in ancient Europe,

答应某人某事 promise somebody something ,

许下诺言 make a promise,

遵守诺言， keep one's promise,

违背诺言 break one's promise,

 答应做某事promise to do something,

 答应某人做某事promise somebody to do something,

 答应某人不做某事promise somebody not to do something,

妈妈，我保证我会更加努力学习。Mom, I promise I'll study harder,

药物奏效了 The medicine worked,

奏效,起作用，产生预期的效果work,

从事实践颜色疗法  practise colour therapy,

向某人建议某事 suggest something to somebody,

但不能说 suggest somebody something   

可数名词 建议suggestion,

 建议做某事  suggest doing something,

建议我做某事  suggest my doing something,

 suggest me doing something,

建议做某事  advise something,

 advise doing something,

建议某人做某事 advise somebody to something,

建议某人不做某事 advise somebody not to something,

不可数, 建议advice,

在某事上给某人建议 give advice to somebody on something,

给你免费的衣服  give you free clothes,

 宁愿做某事  would rather do something,

 宁愿不做某事  would rather not do something,

 宁愿做做某事而不愿做某事  would rather do something than do something,

穿蓝色衣服（表示状态）  be dressed in blue,

有赶走邪灵的力量  have the power to drive evil spirits away,

给男婴穿蓝色  dress baby boys in blue,

感觉有一点压力 feel a little bit stressed,

a little bit,“一点儿”只修饰形容词和副词

一点儿水 a little water,

a bit of water,

 a little, 可修饰不可数名词也可修饰形容词和副词

a bit of, 只修饰不可数名词

今天天气有点儿冷  It's a little cold today,

It's a little bit cold today,

It's a bit cold today,

一个很好的搭配  a good match,

因为强烈的红色可以平衡宁静的白色。 As the powerful red balances the calm white, 

Because, 表直接原因，从句是全句重心， since, 侧重主句，表示显然的或已知的原因

as, 主从句并重， for, 表附加或推断的理由，引导从句用”，”隔开，for, 不可放句首

但是你知道,粉红色没有什么不好的。  But there's nothing wrong with pink, you know,

而且我不确定你穿蓝色是否好看。  And I'm not sure if blue looks good on you,

 你知道彩虹有多少种颜色吗？ Do you know how many colours there are in a rainbow?,

一些人相信颜色能影响我们的心 情。 Some people believe that colours can influence our moods,

你可能会想知道它是否正确。 You may wonder whether it is true,

这篇文章说 明的就是颜色能够起到什么作用以及它们代表什么样的性格特征。 This article explains what colours can do and what characteristics they represent,

生活在寒冷气候中的人们更喜欢在家中使用暖色以创造出一种温暖而舒适的感觉。 People in cold areas prefer warm colours in their homes to create a warm and comfortable feeling,

黄色是太阳的颜色, 因此它能使你想起温暖、阳光明媚的日子。 Yellow is the colour of the sun, so it can remind you of a warm sunny day,

当你难以作出决定时,这能帮你拿定主意。This may help when you are having difficulty making a decision,

你知道颜色与心情之间有 关系吗？ Did you know there is a relationship between colours and moods?,

发现颜色的 力量如何能改变你的心情并提高你的生活质量！ Discover how the power of colours can change your moods and improve your life!,

我们承诺这种疗法会帮助你改变心情,无效退款！ We promise that this therapy can help you change your moods, or you will get your money back!,

红色与白色是很好的搭配,因为热烈的红色可以平衡平静的白色。 Red and white are a good match, as the powerful red balances the calm white,