疑问词/whether＋不定式、too的用法等重点句型详解

疑问词/whether＋不定式、too的用法等重点句型详解知识点包括疑问词/whether＋不定式、too的用法、动词＋it＋宾补＋真正的宾语、Why not do...？/Why don't you do...？、since句式等部分，有关疑问词/whether＋不定式、too的用法等重点句型详解的详情如下：

疑问词/whether＋不定式

1 There will be some experts there to show to us how to live in the wild.

那儿会有一些专家向我们展示如何在野外生活。

句式分析：本句中的how to live in the wild作show的宾语，属于“疑问词/whether＋不定式”结构。

“疑问词/whether＋不定式”结构用法小结：

 

The teacher taught the students how_to_do_the_experiment (＝how they should do the experiment)．

老师教同学们如何做这个实验。(作宾语)

When_to_start (＝When we shall start) has not been decided.

何时动身尚未决定。(作主语)

The problem is where_to_put_this_computer (＝where we should put this computer)．

问题是该把这台计算机放在哪儿才好。(作表语)

I have no idea what_to_say_about_this (＝what I can say about this)．

我不知道对此能说些什么。(同位语)

too的用法

You think that your friend plays computer games too often and spends too much time online.

你认为你的朋友玩电脑游戏太频繁，在网上花太多时间。

句式分析：too用于形容词或副词前，意为“太；过分”。The coat is too large for me.

这件外套我穿太大了。

That music is too loud；turn the radio down.

那音乐太吵了，把收音机关小一点。

[易混辨析]

too much和much too

too much可以用在不可数名词前，意思是“太多”，也可以直接用作代词或副词，后面不跟名词。

I drank too much beer last night.

昨天晚上我啤酒喝得太多了。

Too much was happening all at once.

同时发生了太多事情。

much too用于形容词或副词前，意为“太……，非常”。

You are much too kind to me.

你对我太好了。

Amanda is much too young to get married.

阿曼达太年轻，还不能结婚。

[思维拓展]

too...to...表示否定意义时，意为“太……而不能……”，可用于not...enough to和so...that句式改写。

The child is too young to go to school.

The child is not old enough to go to school.

The child is so young that he can't go to school.

这个孩子太小，还不能上学。

too...to中too前用否定词(如never)时，表示肯定。

It's never too late to learn.活到老，学到老。

can't/can never...too...怎么……也不过分；越……越好

—Must I turn off the gas after cooking?

——做完饭后一定把煤气关掉吗？

—Of course.You can never be too careful with that.

——当然，你越小心越好。

动词＋it＋宾补＋真正的宾语

But spending too much time online is unhealthy and makes it very difficult to focus on other things in life.

但是花太多的时间上网是不健康的，让你很难集中精力于生活中的其他事情上。

句式分析：makes it very difficult to focus on other things in life是“动词＋it＋宾补＋真正的宾语”结构，其中it是形式宾语，真正的宾语是不定式短语to focus on other things in life。

[思维拓展]

“动词＋it＋宾补＋真正的宾语”(即“6123结构”)小结：

①6指常用的动词：think，believe，make，find，consider，feel

②1指形式宾语it

③2指宾补的两种形式：形容词和名词

④3指真正的宾语的三种形式：不定式、动名词、从句

I must make it clear that I'll always support you.

我必须说清楚，我会一直支持你的。

He found it impossible to continue working in Germany.

他发现不可能继续在德国工作了。

Do you consider it any good trying again?

你认为再试一次有用吗？

Why not do...？/Why don't you do...？

Why not discuss the problem together？

为什么不一起讨论这个问题呢？

Why not do...？/Why don't you do...？意为“为什么不做……呢？”，是表示建议的常用交际用语。

这个周日为什么不去野餐呢？

→Why not go for a picnic this Sunday?

→Why don't you go for a picnic this Sunday?

[思维拓展]

常用的表“建议”的交际用语小结：

(1)I advise you(not) to do... 我劝你(不要)做……

(2)You'd better(not) do... 你最好(不要)做……

(3)I suggest that you(should) do... 我建议你……

(4)Why not do...？/Why don't you do...?

为什么不做……呢？

(5)How/What about(doing)．..？……怎么样？

(6)Would you like to do...？你愿意做……吗？

(7)Shall we...？我们……吧？

(8)Let's... 让我们……

You'd better not stay up too late.

你最好不要熬夜太晚。

How about seeing the new movie at the theatre tonight?

今晚去剧院看新电影怎么样？

Would you like to visit my parents with me?

你愿意和我一起去看我父母吗？

since句式

I'm sure he will listen to you，since you are his good friend.

我确信他一定会听你的，因为你是他的好朋友。

since在本句中意为“因为”。since既可以用作连词，也可用作副词，其用法及意义如下：

(1)表示“由于，因为，既然”，引导原因状语从句，一般置于句首，相当于now that。

(2)表示“自从……以后，自……以来”，可用作连词、介词、副词，用来表示时间，其所在的句子的中心动词用现在完成时。

(3)since引导时间状语从句时，若动词为非延续性动词，句子可译为：自……以来有多长时间了；若从句的动词为延续性动词时，句子可译为：没做某事有多长时间了。

I'll be forty next month，since you ask.

既然你问起，我下个月就满40岁了。

Since we have no money，we can't buy it.

因为没有钱，我们不能买它。

My uncle left the town in 1980 and I haven't seen him since.

我叔叔在1980年离开了这个城镇，我从此以后就没有见过他。

Where have you been since I last saw you?

自从我上次见到你之后，你去哪了？

It's two years since I smoked.

我戒烟两年了。

It's two years since I began to smoke.

自从我开始抽烟有两年了。

[易混辨析]

单词	意义区别
because	引导的从句通常表示说话人认为听话人不知道的原因或理由，从句往往是整个主从复合句的重心。所以在所有表示原因的词中是语气最强的。
since，as	since和as表示原因时，往往表示人们显然已经知道的理由或原因。因此，侧重点是主句的内容，原因只是附带说明，在语气中because最强，since次之(在意义上相当于汉语的“既然”)，as最弱。
for	它表示的原因只是附加说明，所以常用逗号与主句分开。另外，for引导的原因状语从句不能放在句首。

He was annoyed because he missed the bus.

他非常生气因为他错过了那班公交车。

Since his method doesn't work，let's try yours.

既然他的方法不行，那就试试你的吧。

As you object，I'll reconsider the plan.

既然你反对，我将重新考虑这个计划。

I recommend seeing the latest film，for it is very exciting and interesting.

我建议看最新的电影，因为它很有趣又令人兴奋。