一篇文章帶你認清初中英語最??嫉娜鬆钫Z從句
日期:2023-07-18 13:01 點擊:
狀語從句指在句子中用作狀語的從句。根據(jù)其作用可分為時間、地點、原因、條件、目的、結(jié)果、讓步、方式和比較等九種狀語從句。
初中階段,我們學(xué)習(xí)的狀語從句主要有時間狀語從句、條件狀語從句和原因狀語從句,今天我們就來復(fù)習(xí)一下這三種狀語從句。
主要連詞:when、while、as、as soon as(一......就......)、before、after、since等。
【注意1】時間狀語從句要符合“主將從現(xiàn)”的原則:即主句用一般將來時,從句用一般現(xiàn)在時。例如:
I will call you as soon as I arrive in Beijing.
I will give you a call when I arrive at London.
【注意2】since 的用法:since引導(dǎo)的時間狀語從句必須是一般過去時,其主句必須時現(xiàn)在完成時。例如:
Since I came to Beijing, I have lived here.
【注意3】while 引導(dǎo)的時間狀語從句中,謂語動詞必須時持續(xù)的; when 引導(dǎo)的時間狀語從句中,謂語動詞可以持續(xù)也可以不持續(xù)。例如:
While I was away last summer, my dog was taken good care of.
When I lived in that small village,I often went to play in the field.
當(dāng)我住在那個小山村的時候,我經(jīng)常去地里玩耍。
When the film ended,all the people began to go out of the cinema.
主要連詞:if, unless(除非=if...not...), as long as(只要)等。
【注意】條件狀語從句要符合“主將從現(xiàn)”的原則:即主句用一般將來時,從句用一般現(xiàn)在時。例如:
If it is fine tomorrow,we will have a picnic outdoors.
Unless you work hard, you won't succeed.(=If you don't work hard, you won't succeed.)
As long as you go, I will go.
主要連詞:because, as(由于), since(因為,既然)等。
【注意】because 引導(dǎo)的原因是未知的原因,as和since引導(dǎo)的原因是已知的原因。例如:
I didn't go to school because I was ill.
As it is raining heavily, we won't go to the park.
Since everyone is here, let's begin our meeting.