英語學習技巧: 必要定語從句和不必要定語從句

　　所謂的語文學習，主要是學習表達能力和理解能力。表達能力包括口語表達能力和書面表達能力，表達要求能夠做到邏輯清晰，語言流暢準確。

　　語言學習的考核點由表達能力和修辭能力構成。接下來我就來具體學習一下表達篇的內容吧！

　　Essential and Nonessential Adjective Clauses

　　必要定于從句和不必要定語從句

　　Remember that an adjective clause is a dependent clause that acts like an adjective in the sentence. This means that it gives more information about a noun or pronoun in the sentence.

　　定語從句是一個從屬分句，在句中作形容詞。可以給出更多關于句中名詞或代詞的信息。

　　Sometimes the information given by the adjective clause is essential. An essential adjective clause is one that is needed for the sentence to make sense. If you took it out, you would not know all the information that you need to know.

　　有時，定于從句提供的信息至關重要。句中需要這一從句使句子的意思更完整。如果缺少此從句，就了解不到完整的信息。

　　At other times, the information given by the adjective clause is nonessential. A nonessential adjective clause is one that is not necessary. The sentence still makes sense and you know everything you need to know even without the clause. So, you could take it out.

　　有些時候，定語從句提供的信息不是那么重要。沒有這一從句，句子也有意義，而且意思完整。因此可以刪掉這一從句。

　　When a sentence has a nonessential adjective clause, the clause is set apart with commas. This shows that it is not essential.

　　如果一句中有不必要定語從句，就會用逗號把從句隔開，表示這句話并不是必須的。

　　Examples of Essential and Nonessential Adjective Clauses:

　　必要定語從句和不必要定語從句的例子：

　　Examples of essential adjective clauses:

　　必要定于從句的例子：

　　1) The man who left his wallet is coming back for it.

　　1）丟了錢包的男人又回來找錢包了。

　　It is essential for us to know which man.

　　有必要知道是哪個男人。

　　2) I do not remember the day that my cousin was born.

　　2）我不記得表弟是哪天出生了。

　　It is essential for us to know which man.

　　有必要知道是哪一天。

　　3) The time when I go to bed changes in the summer.

　　3）夏天的時候，我上床的時間跟其他季節不同。

　　It is essential for us to know what time.

　　需要知道什么時間。

　　4) I want the dog that is black and white.

　　4）我想要那只黑白相間的狗狗。

　　It is essential for us to know which dog.

　　我們需要知道是哪只狗。

　　5) Could you bring me the cup that is on the table?

　　5）可以拿給我桌上的杯子嗎？

　　It is essential for us to know which cup.

　　我們需要知道是哪個杯子。

　　Examples of nonessential adjective clauses:

　　不必要定語從句的例子：

　　1) Lisa, who takes ballet with Jan, is my best friend.

　　1）和簡一起跳芭蕾舞的麗薩是我最好的朋友。

　　It is not essential for us to know about the ballet.

　　不需要知道更多關于芭蕾舞的信息。

　　2) I won first prize, which was a blue ribbon.

　　2）我獲得了一等獎，是條藍色的絲帶。

　　It is not essential for us to know the type of prize.

　　我們不需要知道是什么類型的獎。

　　3) My grandfather, who lives on a farm, said he would teach me to ride a horse.

　　3）我的祖父住在農場，說要教我騎馬。

　　It is not essential for us to know where he lives.

　　我們不需要知道他住在哪。

　　4) The school library, which is next to the cafeteria, is my favorite place in the school!

　　4）咖啡館旁邊的圖書館是我最喜歡的地方。

　　It is not essential to know that it is next to the cafeteria.

　　我們不需要知道圖書館在咖啡館旁邊。

　　5) Mary, whose mom is a nurse, sits behind me in class.

　　5）媽媽是護士的瑪麗，上課時坐在我旁邊。

　　It is not essential for us to know what Mary's mom does.

　　沒有必要知道瑪麗的媽媽做什么。

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