1） It is demanded / necessary / a pity that…結構中的主語從句的謂語動詞要用should 加動詞原形， should 可省略。

句型：

(1)suggested

It is　 (2)important that… (should) do

(3) a pity

(1)suggested, ordered, proposed, required,　 demanded, requested, insisted； (should) do

(2)important, necessary, natural, strange

a pity,　 a shame,　 no wonder

(3)It is suggested that we (should) hold a meeting next week.

　 It is necessary that he (should) come to our meeting tomorrow.

2）在賓語從句中的應用

在表示命令、建議、要求等一類動詞後面的從句中。

order, suggest, propose, require, demand, request, insist, command, insist (should) do

　 I suggest that we (should) hold a meeting next week.

　 He insisted that he (should ) be sent there.

　注意： 如suggest, insist不表示"建議" 或"堅持要某人做某事時"，即它們用于其本意"暗示、表明"、"堅持認為"時，賓語從句用陳述語氣。

　 The guard at gate insisted that everybody obey the rules.　

　判斷改錯:

　（錯）　You pale face suggests that you (should) be ill.

　 (對)　 Your pale face suggests that you are ill.

　 (錯)　 I insisted that you ( should) be wrong.

　 (對)　 I insisted that you were wrong.

3）在表語從句，同位語從句中的應用

在suggestion, proposal, idea, plan, order, advice等名詞後面的表語從句、同位語從句中要用虛拟語氣，即（should） 動詞原形。

My idea is that we (should) get more people to attend the conference.

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

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