新東方泡泡少兒英語介紹稱在復(fù)合句中，起名詞作用的從句，稱為名詞性從句。根據(jù)句法功能，名詞性從句可以分為主語從句，賓語從句?表語從句和同位語從句。名詞性從句不論是用什么詞來引導(dǎo)，從句都必須用陳述句語序，即“引導(dǎo)詞+主語+謂語+其它”。疑問代詞或疑問副詞充當(dāng)引導(dǎo)詞時，有詞匯意義且在從句中擔(dān)當(dāng)一定的成分;whether(if只用于賓語從句)作引導(dǎo)詞僅有詞匯意義且不在句中擔(dān)當(dāng)任何成分;如果從句的語法成分完整，主從句語意通順時一般就該用that來引導(dǎo)。

    新東方泡泡少兒英語介紹稱在復(fù)合句中，起名詞作用的從句，稱為名詞性從句。根據(jù)句法功能，名詞性從句可以分為主語從句，賓語從句?表語從句和同位語從句。名詞性從句不論是用什么詞來引導(dǎo)，從句都必須用陳述句語序，即“引導(dǎo)詞+主語+謂語+其它”。疑問代詞或疑問副詞充當(dāng)引導(dǎo)詞時，有詞匯意義且在從句中擔(dān)當(dāng)一定的成分;whether(if只用于賓語從句)作引導(dǎo)詞僅有詞匯意義且不在句中擔(dān)當(dāng)任何成分;如果從句的語法成分完整，主從句語意通順時一般就該用that來引導(dǎo)。

    一、that 用于引導(dǎo)賓語從句時通�？梢允÷裕�尤其是在口語中。而that引導(dǎo)主語從句?表語從句?同位語從句時一般不能省略。如:

    he told me (that) the meeting had been put off.

    that our volleyball team had beaten theirs pleased every one of us.

    the problem with building the factory is that we are lack of money.

    word came that he has recovered from the bad disease.

    that引導(dǎo)賓語從句時在以下幾種情況中不能省略:

    1. 賓語從句為多個并列句時，前面分句的that可以省略，但最后一個分句的引導(dǎo)詞that不能省略。如:

    he told me (that) he had entered a university in nanjing and that he was enjoying the college life there.

    2. 賓語從句本身為一個復(fù)合句且復(fù)合句中的從句位于主句前時，that不能省略。

    he said that if i went there， he would go too.

    she believes that what the teacher says must be right.

    3. 主句與賓語從句加入了插入語時。

    he said， in his opinion， that it was too early for middle school students to carry cell-phones.

    4. that引導(dǎo)的賓語從句后置，用形式賓語it代替時。

    china has made it clear to the world that it is strongly against terrorism.

    5. 跟在介詞but， besides， except等后引導(dǎo)賓語從句時。

    your composition is very good except that there are a few mistakes.

    二、that引導(dǎo)主語從句可以用形式主語it來代替并將從句后置，從而達到平衡句子的目的。這樣的句式有:

    1. it’s+名詞+that…用于該句型的名詞有a pity， a great pleasure， no wonder， (high) time等。

    it’s a pity that you shouldn’t go with us to the concert tonight.

    it’s high time that they started to work.

    2. it’s+形容詞+that…用于該句型的形容詞有possible， necessary， important， natural， strange 等。

    it’s true that his brother got his left hand hurt when he was working on the machine.

    it’s necessary that we practiced speaking english as often as possible.

    3. it+不及物動詞+that… 用于該句型的不及物動詞有happen， occur， appear等。

    it happened that a doctor was on the train at that very moment.

    it occurred to me that i was going the wrong way.

    4. it’s+過去分詞+that…用于該句型的過去分詞有said， reported， announced等。

    it is said that two people got killed in the traffic accident yesterday.

    it is announced that china is strongly against terrorism.

    三、當(dāng)that引導(dǎo)的賓語從句后接有補足語時，也習(xí)慣將從句后置，而用形式賓語it代替。即句型:主語+think/consider/find…+it+補足語(形容詞或名詞)+that賓語從句。如:

    we all think it great fun that we learn english in mr. hu’s class.

    mr. green considers it important that students should form good habits of learning.

    四、doubt作動詞時其后的賓語從句及作名詞時其后的同位語從句只能用that來引導(dǎo)。如:

    we don’t doubt that he is fit for this job.

    there is no doubt that we chinese are determined to stop taiwan from being separated from mainland.

    五、名詞the reason作主語或why開頭的主語從句，其后的表語從句只能用that引導(dǎo)，不能用because。如:

    the reason for coming late is that i was caught in the traffic jam.

    why she kept silent about the matter is that she didn’t want to be involved in it.

    六?that和whether都不作句中成分，區(qū)別時要從主句來尋找信息。若主句中有question， hasn’t been decided， is not known yet， depends on， wonder， doubt…等詞語時且表示“不肯定”或事物的“兩面性”時應(yīng)用whether;而表示“肯定性”?“單一性”則應(yīng)用that。