主語從句中的虛擬語氣

　　一、“It is (was)+形容詞(或過去分詞)+that……”結(jié)構(gòu)中的虛擬語氣

　　在形如“It is (was)+形容詞(或過去分詞)+that……”結(jié)構(gòu)中，使用某些表示愿望、建議、請求、命令、可能、適當(dāng)、較好、迫切、緊近、重要等形容詞后的主語從句的謂語也用虛擬語氣。其表達形式為should +動詞原形或省略should直接用動詞原形(美國英語中省去should)

　　常用的形容詞：* natural (自然的), appropriate (適當(dāng)?shù)?,advisable (合適的), preferable (更可取的), better (更好的)* necessary (必須的), important (重要的), imperative (急需的), urgent (急迫的), essential (本質(zhì)的), vital (必不可少的)* probable (很可能的), possible (可能的)* desirable (極好的)advisable(合理的)，compulsory(必須的)，crucial(緊急的)，desirable(理想的)，essential(必要的)，imperative(迫切的)，incredible(驚人的)，necessary(必要的)，possible(可能的)，strange(奇怪的)，urgent(緊迫的)。

　　常用的過去分詞(Past Participle):* required (需要的), demanded (要求), requested (被請求的), desired (要求)* suggested (建議), recommended (推薦)* orderd (命令)

　　1. It is necessary that we (should 可省略,下同)have a walk now.(necessary, should + have) (表示有需要去散步)

　　2.It was necessary that we (should) make everything ready ahead of time.(necessary, should + make) (表示有必要事先做好準備)

　　3. It is required that nobody (should) smoke here.(required, should + smoke) (表示要求不要在此抽煙)

　　4. It is important that every pupil (should) be able to understand therule of school.(important, should + be) (表示重要的是學(xué)生都能了解校規(guī))

　　5. It's important that we (should) take good care of the patient.(important, should + take) (表示重要的是照顧好病人)

　　6. It is natural that she should do so. (形容詞natural, should+動詞原形do)

　　7.It is essential that these application forms be sent back as early as possible.這些申請表應(yīng)盡早地寄回，這是很重要的。

　　8.It is vital that enough money be collected to fund the project.重要的是募集足夠的錢，為這個項目提供資金。

　　9.It is desired that we(should)get everything ready this evening.希望我們今晚一切都準備就緒。

　　注：在上述所列形容詞后面用that引出的賓語從句中，謂語動詞也要用虛擬語氣。

　　10.I don't think it advisable that Tom be assigned to the job since he has no experience.湯姆缺乏經(jīng)驗，指派他做這項工作我認為是不恰當(dāng)?shù)摹?/font>

　　二、在It is +名詞+that…的主語從句中的虛擬語氣

　　在It is +名詞+that的主語從句中，常用虛擬語氣，表示建議、命令、請求、道歉、懷疑、驚奇等。這類名詞

　　有：advice ，decision ，desire ，demand ，idea，motion ，order，pity ，preference ，proposal，recommendation ，

　　requirement，resolution，shame，suggestion，surprise，wish，wonder等。

　　⑴、It is my proposal that he be sent to study further abroad.我建議派他去國外進一步學(xué)習(xí)。

　虛擬語氣用在表語從句或同位語從句中

　　當(dāng)某些表示建議、請求、命令等主觀意向的名詞作主語時，其后的表語從句或同位語從句需用虛擬語氣，其表達形式為should +動詞原形或直接用動詞原形。這類名詞常見的有：

　　demand (要求), desire (請求),requirment (要求)

　　advice (勸告), recommendation (建議),suggestion (建議)

　　order (命令)

　　necessity (必要地), preference (優(yōu)先)

　　proposal (計劃), plan (計劃), idea (辦法)，

　　recommendation以及plan，idea，resolution等。

　　We are all for your proposal that the discussion be put off.我們都贊成你提出的將討論延期的建議。

　　The suggestion that the mayor present the prizes was accepted by

　　everyone.由市長頒發(fā)獎金的建議被每個人接受。

　�、�、 The advice is that we (should 可省略，下同) leave at once.

　　(名詞advice，should + leave) (表示加以勸告)

　�、�、 My idea is that we (should) get more people to attend the

　　conference.

　　(idea, should + get) (表示做出主意)

　�、恰� I make a proposal that we (should) hold a meeting next week.

　　(proposal, should + hold) (表示做出計劃)

　�、�、 The judge assented to the suggestion that .

　　[A]both of the criminals will soon be set freedom

　　[B]some of the criminals there are of guilt only

　　[C]the girl was to be paroled in the custody of a welfare society

　　[D]the prisoner be sentenced to death