在表示建議、命令、要求、忠告等動(dòng)詞的后面，其賓語(yǔ)從句的謂語(yǔ)用“should+動(dòng)詞原形”表示虛擬語(yǔ)氣

常用的此類動(dòng)詞有：

表示“要求”的：ask, desire, request, demand, require, beg

表示“提議、勸告、建議”的：move, prpose, suggest, recommend, advise, vote

表示“決定、命令”的：decide, order

表示“主張”的：maintain, urge

表示“同意、堅(jiān)持”的：consent, insist

例：The doctor suggested that he (should) try to lose his weight.

He insisted that we (should ) tell him the news.

上述動(dòng)詞的名詞形式，demand, desire, requirment, advice, order, decision, recommendation, suggestion, 以及necessity, preference, plan, motion, idea等名詞，其后的表語(yǔ)從句或同位語(yǔ)從句，也用“should+動(dòng)詞原形“表示虛擬語(yǔ)氣。現(xiàn)代英語(yǔ)，特別是美國(guó)英語(yǔ)，常省去“should”，例：

The advice is that we (should) leave at once.

He idea that we (should)visit Great Wall was warmly welcomed.