# 請問此題選擇的英文文法及用語用詞？？急急急

a) Functioned

b) the Earth’s

c) from

Functioned as a filter in the stratosphere, the ozone layer shields the Earth’s surface from much ultraviolet radiation .

(專有名詞：

filter濾光器 ， stratosphere 同溫層， ozone layer臭氧層，surface 保護

Rating

答案是 a

Functioned (-->Functioning) as a filter in the stratosphere, the ozone layer shields the Earth’s surface from much ultraviolet radiation .

這是一個分詞構句

我們先把這個句子分成兩個句子來看

The ozone layer functions as a filter in the astratosphere.

The ozone layer shields the Earth's surface from much ultraviolet radiation.

兩句的主詞一樣,我們可以把其中一句的動詞用分詞 (主動加ing,被動則加ed)的形式,然後連接兩個句子.

這兩個句子都是主動,你也寫出來了.

所以我們可以寫出這兩種連接的方法:

1. --> Functioning as a filter in the astratosphere, the ozone layer

shields the Earth's surface from much ultraviolet radiation.

2. --> Shielding the Earth's surface from much ultraviolet radiation,

the ozone layer functions as a filter in the astratosphere.

所以,原本句子中用的functioned,是錯的,要改成functioning.