五、if,whether在宾语从句中的区别

① if和whether在作“是否”解时,引导宾语从句常放在动词know,ask,care,wonder,find out等之后,介词后一般不用if

② 少数动词,如:leave,put,discuss,doubt后的宾语从句常用whether.

③ whether后可以加or not,但是if不可以.

④ 在不定式前只能用whether.

(如：I can’t decide whether to stay. 我不能决定是否留下。)

⑤ 避免歧异时,我们常用whether而不用if.

六、哪些宾语从句不可以省略引导词that

当that作learn,suggest,explain,agree,wonder,prove,mean,state,feel,hold等动词的宾语时;

当宾语从句较长时;

当主语状语置于主句尾,宾语从句之前时;

当主语谓语动词(包括非谓语动词)与宾语从句之间有插入语时;

当一个动词带有两个或两个以上宾语从句时,此时第一个that可以省略,第二个that不可以省略;

当宾语从句中的主语是this,that或this,that做主语的定语时;

当宾语从句是双宾语中的直接宾语时;

当宾语从句的主语是非谓语动词或主语从句时;

当主语中的谓语动词是固定词组时;

当宾语从句有it做其先行词时;

在直接引语中,转述分句把宾语从句隔开时.

七、宾语从句的否定转移

主句的谓语动词是think,believe,imagine,suppose,consider,espect,fancy,guess等,并且主句的主语是第一人称而且为一般现在时,从句的否定词一般要转移到主句上来,其反义疑问句一般与宾语从句一致.

I don’t think he will come to my party.而不能说成I think he won’t come to my party.

我认为他不会来我的舞会.

I don’t believe that man is killed by Jim,is he?

我认为那个人不是Jim所杀的,是不是?

如果宾语从句中有某个含有否定意义的形容词或副词,其反义疑问句要用肯定形式.

We find that he never listens to the teacher carefully,does he?

我们发现他从来不仔细听老师讲课,是不是?

八、宾语从句的时态和语序

当主句为现在时或将来时,宾语从句的时态一般不受主句的时态所影响.

当主句为过去时

①从句用一般过去时或过去进行时表示与主句谓语动词动作同时发生

I only knew he was studying in a western country,but I didn’t know what country he was in.

我只知道他当时在西方的一个国家读书,可不知道是哪个国家.

He asked me if I was reading the story The Old Man and the Sea when he was in.

他问我他进来的时候我是否正在读<<老人与海>>.

②从句过去完成时表示该动作发生在主句谓语动作之前

He told me that he had told Mary about the meeting already.

他告诉我他已经把有关会议的事情告诉的了Mary.

③从句谓语用过去将来时表示该动作发生在主句谓语动作之后

The reporter asked if the government would take necessary measures to put down the to-do.

记者问政府是否会采取必要的措施镇压骚乱.

如果从句是一个客观真理,那么从句的时态不根据主句的时态而变化

The teacher said that the moon goes around the earth yesterday.

老师昨天说月亮绕着地球转.

当宾语从句的引导词是who,which,what,when,where,how,why等表疑问时,不能按正常语序安排,经常将这类引导词置于句首

Who do you think the public might choose as their favorite singer this year?

你认为今年公众会选谁为他们最喜欢的歌手.

宾语从句(版本二)

学习宾语从句要抓住三要素：连接词、语序和时态。

1.连接词

连接词一般都是that(指事务或人),which(指事),who(指人)

1.从句为陈述句，常选择连接词that或将that省略，直接与主句相连。

2.从句为一般疑问句，常选择连接词if或whether。在 whether … or not 结构中不能用 if 替换。

3.从句为特殊疑问句，常选择what,when,where,which,who,how等的疑问代、副词作连接词。

注意：当who为主语时，句式为：who+谓语+其他

2.判断时态情况：

1.主句是一般现在时，从句为各种时态情况。

2.主句是一般过去时，从句为各种相应过去时态注意：从句描绘客观事实，用一般现在时。

eg:

1. The teacher told the children that the sun____ round.

A. was B. is C. were D. are

2. I believe that our team____ the basketball match.

A. win B. won　C. will win　D. wins

3. I don’t know____ to visit the old man.

A. whether B. if C. that D. who

4.The soldiers soon reached( )was once an old temple(　)the villagers used as a school.

A.which;where B.what;which　C.where;which D.what;where

答：选B，动词reach后接宾语从句，从句缺少宾语，where不可，which引导宾语从句时表疑问含义“哪一个…”而此句中并非疑问含义，不知道哪一座庙宇，而是用what从句表陈述含义，意“过去的一座旧庙宇”;temple后为对其修饰的定语从句，用关系代词which代替，并在从句中作动词used的宾语，use sth. as…“把…用作…