(1)(教材P53)Recently，I have experienced constant problems in the computer room.

最近，我在计算机房遭遇了一连串的问题。

(2)The birth rate in this city is almost constant.

这座城市的出生率几乎是不变的。

(3)He is constant to his purpose.

他始终抱定目标。

(4)She is constant in love.她对爱情忠贞不渝。

[归纳拓展]

(1)constant adj.不断的，连续发生的；恒定的

constant complaints没完没了的抱怨

constant trouble时常发生的麻烦

at a constant speed以恒速

be constant to/in...对......忠诚

(2)constantly adv.持续不断地；经常地 [即时跟踪]

(1)It moves at a constant speed.

它以恒速移动。

(2)He is in constant trouble with the police.

他总是不断地与警察惹麻烦。

(3)He has been in his devotion to scientific studies.

A.constant B.constantly C.content D.contentedly

答案　B

解析　句意为：他已经在科学研究方面持续地投入了他的精力。因为修饰谓语动词，所以应用副词。

2.function

[语境感悟]

(1)(教材P53)Also，we need to buy new keyboards，mouses and monitors，because many of the keyboards have letters missing and some mouses and monitors are not functioning properly.

我们还需要购置键盘、鼠标和显示器，因为其中的许多键盘的字母键掉了，有些鼠标和显示器不好用。

(2)The function of the heart is to pump blood through the body.心脏的功能就是把血液输往全身。

(3)Despite the power cuts，the hospital continued to function normally.