+動詞原形的情形

　　1.在動詞suggest, order, demand, propose, command, request, desire, insist, require, decide, promise, resolve, argue, maintain, determine, recommend, advise, advocate, persuade等表示命令、建議、要求動詞后的賓語從句中。

　　She insisted that the seats be booked in advance. 她堅持要預定座位。

　　He advised that the doctor be sent for. 他勸我們派人請醫生。

　　注：如果上述動詞作其他意思解釋，或者說話者認為所講的事是事實，要用陳述語氣。

　　When asked why he declined our invitation, he suggested that he was not on good terms with the director.

　　真題重現

　　The professor required that __________________。

　　參考答案：we hand in our research report

　　2. 在advice, demand, order, necessity, resolution, decision, proposal, requirement, suggestion, idea, recommendation, request, plan,等名詞后的主語從句或表語從句中------上面動詞對應的名詞

　　He issued the order that the troops withdraw at once. 他命令部隊馬上撤退。

　　3. 在形容詞important, necessary, imperative, natural, urgent, essential, appropriate, desirable, vital, advisable, preferable, incredible以及短語no wonder, a pity等可以構成It is +形容詞+that句型中。

　　It is necessary that some immediate effort be made. 必須立即采取行動。

　　真題重現

　　It is absolutely unfair that these children ______.

　　參考答案：These children be deprived of the right to receive education.

　　if或but for等引導的條件句

　　if引導虛擬條件句的用法

　　would+動詞原形

　　He wouldnt feel so cold if he were indoors.他要是在室內就不會覺得冷了。

　　I am sorry I am very busy just now. If I had time, I would certainly go to the movies with you.

　　我很抱歉，現在很忙。如果有時間，我肯定陪你去看電影了。

　　The conference wouldnt have been so successful if we hadnt made adequate preparations.

　　如果我們不做充分的準備，會議是不會開得這么成功的。

　　If it snowed/were to snow/should snow tomorrow, I should stay at home.

　　but for=if it were not for/if it had not been forl

　　But for your help they would not have fulfilled the task in time.

　　真題重現

　　The victim _______________________if he had been taken to hospital in time

　　參考答案：would have survived

　　But for mobile phone, ____________________.

　　我們的通訊就不可能如此迅速和方便)

　　參考答案：our communication would not have been so efficient and convenient.

　　1If you had ___________________.

　　參考答案：followed my advice/suggestion, you would not have been in trouble.

　　It is time 句型要求用虛擬語氣

　　謂語動詞用過去式，指現在或將來的情況，表示早該干某事而已經有些晚了。

　　Its time_____________________ about the traffic problem downtown.

　　something was done/some measures were taken

　　動詞wish后的賓語從句用虛擬語氣

　　I wish she were here. 她在這里就好了。

　　I wish you would go with us tomorrow. 但愿你明天跟我們一塊去。

　　I wish she had taken my advice. 那時她要是聽我的話就好了。

　　if only后用虛擬語氣

　　+動詞原形的情形

　　1.在動詞suggest, order, demand, propose, command, request, desire, insist, require, decide, promise, resolve, argue, maintain, determine, recommend, advise, advocate, persuade等表示命令、建議、要求動詞后的賓語從句中。

　　She insisted that the seats be booked in advance. 她堅持要預定座位。

　　He advised that the doctor be sent for. 他勸我們派人請醫生。

　　注：如果上述動詞作其他意思解釋，或者說話者認為所講的事是事實，要用陳述語氣。

　　When asked why he declined our invitation, he suggested that he was not on good terms with the director.

　　真題重現

　　The professor required that __________________。

　　參考答案：we hand in our research report

　　2. 在advice, demand, order, necessity, resolution, decision, proposal, requirement, suggestion, idea, recommendation, request, plan,等名詞后的主語從句或表語從句中------上面動詞對應的名詞

　　He issued the order that the troops withdraw at once. 他命令部隊馬上撤退。

　　3. 在形容詞important, necessary, imperative, natural, urgent, essential, appropriate, desirable, vital, advisable, preferable, incredible以及短語no wonder, a pity等可以構成It is +形容詞+that句型中。

　　It is necessary that some immediate effort be made. 必須立即采取行動。

　　真題重現

　　It is absolutely unfair that these children ______.

　　參考答案：These children be deprived of the right to receive education.

　　if或but for等引導的條件句

　　if引導虛擬條件句的用法

　　would+動詞原形

　　He wouldnt feel so cold if he were indoors.他要是在室內就不會覺得冷了。

　　I am sorry I am very busy just now. If I had time, I would certainly go to the movies with you.

　　我很抱歉，現在很忙。如果有時間，我肯定陪你去看電影了。

　　The conference wouldnt have been so successful if we hadnt made adequate preparations.

　　如果我們不做充分的準備，會議是不會開得這么成功的。

　　If it snowed/were to snow/should snow tomorrow, I should stay at home.

　　but for=if it were not for/if it had not been forl

　　But for your help they would not have fulfilled the task in time.

　　真題重現

　　The victim _______________________if he had been taken to hospital in time

　　參考答案：would have survived

　　But for mobile phone, ____________________.

　　我們的通訊就不可能如此迅速和方便)

　　參考答案：our communication would not have been so efficient and convenient.

　　1If you had ___________________.

　　參考答案：followed my advice/suggestion, you would not have been in trouble.

　　It is time 句型要求用虛擬語氣

　　謂語動詞用過去式，指現在或將來的情況，表示早該干某事而已經有些晚了。

　　Its time_____________________ about the traffic problem downtown.

　　something was done/some measures were taken

　　動詞wish后的賓語從句用虛擬語氣

　　I wish she were here. 她在這里就好了。

　　I wish you would go with us tomorrow. 但愿你明天跟我們一塊去。

　　I wish she had taken my advice. 那時她要是聽我的話就好了。

　　if only后用虛擬語氣