名詞性從句即充當名詞作用的從句，一般包括主語、賓語、表語和同位語從句。
58. We are talking about if this plan should be carried out.
if 和whether都可以引導動詞的賓語從句，如果從句作的是介詞賓語，只能用whether引導。所以把if改為whether。
59. I don’t know what the matter is.
此句應為I don’t know what is the matter, 可以把what看成從句的主語。
60. My plan is we try for a second time.
表語從句的引導詞如為that，一般不省略。因此在we前加上that。
61. What will the professor say is not known yet.
名詞性從句的語序都是陳述句語序。因此應改為：What the professor will say is not known yet.
（十二） 狀語從句
狀語從句一般均有從屬連詞引導，在復合句中表示時間、原因、結(jié)果、讓步、條件等。
62. I will go unless he invites me.
此句意為“除非他邀請我，否則我不去?！?而unless相當于if not，所以本句應改成：I won’t go unless he invites me。
63. Although he tried, but he still couldn’t keep up with the others.
although和but不能同時用在一句話中，去掉任何一個都可以。另外，用了because 或since就不用so了。
64. I won’t stay until he comes back.
含有not ---until的句子的謂語動詞應是點動詞，含有until的肯定句的動詞應是延續(xù)性動詞，此句有兩種改法：I will stay until he comes back.或I won’t leave until he comes back.
（十三） 定語從句
定語從句的難點是關系代詞（who, whose, that, which, as）和關系副詞的使用。
65. An orphan is a child who’s parents are dead.
定語從句中表“----的”引導詞只有whose，所以把who’s改為whose。
66. This is the very thing which I lost yesterday.
如果先行詞前有the only, the last, the very以及形容詞最高級、序數(shù)詞等修飾時，定語從句的引導詞只能用that。
67. This is the school in that my cousin studies.
定語從句的先行詞為物，而且引導詞放在介詞后時，只能用which.
68. She is one of the students who has failed in the exam.
定語從句修飾one of加上復數(shù)名詞時，復數(shù)名詞是定語從句的先行詞，因此把has改為have。但是，如one之前有the only, 則仍用has.
69. I like the American town where we visited last month.
定語從句的先行詞用關系代詞還是關系副詞要看定語從句中缺不缺主語或賓語，如缺，用關系代詞，如不缺用關系副詞。此句中visit為及物動詞，后無賓語，因此把where改為which 或that。
70. I , who is your friend, can help you in time of trouble.
定語從句的謂語動詞應與其先行詞保持一致，因此把is改為am。
71. China is a developing country, that is known to all.
非限定性定語從句的引導詞永遠不會是that，因此把that改為which或as。非限定的判斷方法是定語從句前有逗號。
（十四） 主謂一致
此問題的關鍵是分析主語是單數(shù)還是復數(shù)。
72. The teacher and writer are invited to give a speech at the meeting.
teacher 和writer共用一個冠詞，指的是一個人一身兼二職，所以謂語動詞應為單數(shù)。把are改為is。但the teacher and the writer則指兩個人。
73. No one except my parents know it.
主語后加except再加上若干數(shù)量的名詞，謂語動詞和主語即no one保持一致。所以把know改為knows。類似的用法的詞或短語有：but, besides, with, together with, along with, as well as等等。
74. My clothes are made in Hong Kong.
clothes 為復數(shù)名詞，謂語動詞應為復數(shù)，把is改為are。
75. The number of the students in that school are about one thousand.
此句的主語為number而不是students，因此把are改為is。但a number of students 作主語則應視為復數(shù)。
76. Not only Tom but also his parents is in the office.
Not only ….but also連接名詞作主語應由but also后的名詞單復數(shù)來確定。此句中的is 應改為are.
77. The population of our country are increasing slowly now.
population 單獨作主語謂語動詞經(jīng)常用單數(shù)，所以此句中的are改為is。如果其前有分數(shù)或百分數(shù)，而且后面又有復數(shù)名詞時謂語動詞用復數(shù)。如：One fifth of the Chinese population are workers。
（十五） 倒裝
倒裝就是謂語或部分謂語放在了主語的前面。
78. No sooner he had reached the station than the train left.
no sooner為否定副詞，放于句首時句子要部分倒裝，因此此句應改為：No sooner had he reached the station than the train left. 這類否定意義的副詞還有never, hardly, seldom, not only, scarcely等。
79. Here comes he.
here 放于句首時,句子主謂要完全倒裝, 但句子主語為代詞時，則主謂不倒裝。此句應改為：Here he comes. 又如：There comes the teacher.
80. A child as he is, he can speak five languages.
用as引導讓步狀語從句，可把形容詞、副詞和不帶冠詞的名詞放于as前。所以前半句改為：Child as he is----。又如：Young as he is, he knows a lot.
（十六） 虛擬語氣
虛擬語氣即假設語氣，動詞形式要作相應變化。
81. She would have come if we invited her.
這是與過去事實相反的虛擬假設，從句應該用過去完成時。所以在we后加had。
82. His suggestion is that they would stay in Paris for a few days.
suggestion 的表語從句也應用虛擬語氣，必須用should加動詞原形，should可以省略。此處去掉would或把would改為should。
83. I wish I have done the work last week.
wish后的時態(tài)應該把真實時態(tài)往后推一個時態(tài)，所以把have改為had。
84. It’s time that we go to bed.
句式為It’s time sb. did sth. 所以把go改為went。又如：It’s time we left now.
85. I would rather you have another try tomorrow.
句型為would rather sb did sth. 所以把have改為had。
（十七） there be 句式
86. There are a pen and several books on the table.
there be句式遵循謂語動詞就近原則，a pen 為單數(shù)，所以把are改為is。
87. There were several people stood at the back of the room.
there be 句式的謂語動詞為be動詞，句中其他的動詞應為非謂語動詞。所以把stood改為standing。
（十八） it的用法
it 構(gòu)成強調(diào)句型和形式主語，形式賓語是易錯之處。
88. I find that interesting to learn English.
此句中的that 應改為it。it在句中作形式賓語，不可以用that替代。it也可以做形式主語，如：It is certain that they will come.
100. When was it he left school?
本句是強調(diào)句型的疑問句，應在it后加that, 又如：It was yesterday that he came here.
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