高考英語易錯點：虛擬語氣
I 虛擬語氣在if 引導(dǎo)的條件句中的易錯點。
① if my lawyer had been here last Saturday, he would have prevented me from going.
�、� if you had studied hard at school, you would be a college student now.
句子①②都是虛擬語氣在條件句中的使用，從句中都是假設(shè)過去的情況，所以用過去完成時，但在主句中，句①依然指代過去的情況，謂語動詞是would have done，而②中含有一個表示現(xiàn)在的時間狀語now, 這樣就必須將其理解為假設(shè)現(xiàn)在的情況，所以謂語動詞必須為would/should/might+動詞原形，學(xué)生在這一點上經(jīng)常會忽略now的存在，從而按句①的形式填寫答案。
�、蛱摂M語氣在名詞性從句中的用法
1.在it is important (strange, natural, necessary……)+that 句子或者It is decided (ordered, suggested, demanded, advised……)+that句子中，主語從句中的謂語動詞常用(should)+動詞原形結(jié)構(gòu)，表示某事“重要”、“必要”、“被決定”等
例如：① it is important that everyone (should ) obey the rules all day and all night.
�、� it is decided that the meeting (should) be held tomorrow afternoon.
2. suggest, insist 后面指賓語從句時需注意的地方
1)①suggest 當(dāng)“建議”“提出”講時，其后賓語從句的謂語動詞常用“should+動詞原形”
例如：He suggested that the work (should) be started at once 他建議立即動工。
類似的動詞還有insist堅持，demand要求，desire要求、請求，request請求，require要求、需要，order命令，propose建議，command命令，ask要求，advise建議，prefer寧愿等。
這些動詞變被動語態(tài)(如：It is suggested + that主語從句)形式后，主語從句謂語動詞仍用“(should)+動詞原形”
這些動詞變名詞(如suggestion)后，其后的表語從句和同位語從句中的謂語部分仍用“(should)+動詞原形”
②suggest 當(dāng)“提出(某看法)，暗示，啟發(fā)”講時，其后賓語從句的動詞不用虛擬語氣。
例如：(1)The police suggested that the thief might be one of the family member
警察局提出竊賊可能是一名家庭成員。
(2)Her yawns suggests that she is sleepy. 她打哈欠表明她困了。
(3)Although he didn’t suggest that we __ the decision to swim across the river, but his look suggested that our decision __wrong.雖然他沒提出我們應(yīng)該終止游過這條河的決定，但他的表情表明我們的決定是錯誤的。
A：stop; was B: should stop; be C: stopped ;was D: stopped; should be
在這個句子中，前一個suggest當(dāng)“建議”“提出”講，而后一個作“表明”講，所以答案為“A”
2)①insist作“堅決要求…該…;堅持認(rèn)為…定要…”講時，其后賓語從句的謂語動詞用“(should)+動詞原形”
例如：I insisted that you (should) be there on time.我堅持認(rèn)為你應(yīng)該準(zhǔn)時到那里去
②insist 作“堅持(意見，看法);堅持說，確信”講時，其后從句不用虛擬語氣。
例如：He suggested (that) he heard someone in the next room. 他堅持說他聽到隔壁屋子里有人。
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