英语是世界上最广泛的第二语言，以下是精品学习网为大家整理的英语高二下册第四单元知识点，希望可以解决您所遇到的相关问题，加油，精品学习网一直陪伴您。

Ⅰ.语言要点

1.keep my eyes open

使眼睛睁开着，这是keep跟带形容词的复合结构，例如：

①Good food keeps you healthy.

好的食品使你健康。

②Please keep the boy quiet.

请让这男孩安静。

另外keep还可以跟带分词、介词短语、副词的复合结构。

①She kept we waiting outside.

她让我在外面等着。

②He kept his eyes shut and stayed where he was.

他闭着眼睛待在原地。

③if your hands are cold，keep them in your pockets.

如果你手冷，把它们放在口袋里。

④The cold weather kept in doors.

寒冷的天气使我们待在家里。

2.be sure of/to do.

①He is sure of success = he is sure that he will succeed.

②He is sure to succeed= he will certainly succeed.

③I’m sure of the fact.

我确实相信这件事。

④.Be sure not to forget.

千万别忘记了。

3.disagree with=not agree

①Even friends some times disagree.

既使是朋友，有时意见也不相同。

②The reports from Rome disagree with those from Milan.

来自罗马的报导与来自米兰的报导不一致。

③The climate disagrees with me.

我不适应这气候。

4.vary from culture to culture

The weather varies from very cold to quite mild.

天气变化从很冷变得相当温和。

from...to...从……到……

①1wanttOknowaboutthisthingkombeginningtOend.

我想从头至尾了解这件事。

②They have always lived from hand to mouth.

他们一直过着勉强糊口的日子。

③She was trembling from head to foot.

她全身发抖。

5.There also differences as to how often…

As to：about concerning关于;至于

As to your brother，I’ll deal with him later.

至于你的兄弟，我以后对付他。

how可以和形容词和副词连用，用于询问句。

eg：how much，how many，how old，how tall，how high，how long，how soon，how far，how often等等。

①Howheavyi8yourschoolbag?

你的书包有多重?

②一How long does the flight take?

一At least three hours.

飞行时间需要多久?

至少三小时。

③一How often do you so there?

——Twice a month.

你多久去那儿一次?