高中英语 · 情态动词与虚拟语气（R3 复习）

2026-2027学年第10周 · 高考真题拆解与模拟训练 · 第三轮复习（内容全新）

一、知识点精讲

这一轮不再重复 R1 的基础语义体系，也不重复 R2 的"本可以/本该"与 wish/would rather 套路，主攻四大特殊句型与情态推测的细分视角。抓住"触发词 → 时间维度 → 动词形式"这一条线，比死背公式稳得多。

1. 省略 if 的部分倒装虚拟（Were / Should / Had 提前）：当 if 虚拟条件句含 were / should / had 时，可省略 if，把这些词提至句首构成部分倒装。注意虚拟中 be 一律用 were（不用 was）；否定词 not 必须置于主语后，即 Were it not for...（绝不能写成 Weren't it）。

2. as if / as though 方式状语从句虚拟：表示"仿佛、好像"。与现在相反 → did / were；与过去相反 → had done。若从句情况很可能是真实的（尤其用在 look / sound 后），则用陈述语气。

3. It's (high) time (that) + 过去式 / (should) do：should 不可省略；暗含"早该做却迟迟未做"的催促意味，是高考单选高频点。

4. 主语从句惊讶 / 评价型虚拟（It is strange / important / natural that ... should）：should 表"竟然、理应"。这与 R1 中 suggest / insist 的"建议要求类"是不同语义分支——此处由惊讶、自然、重要等评价形容词触发。

5. 情态动词推测的"把握程度 + 时态视角"细分：肯定把握 must > should / ought to > may / might；否定 / 疑问用 can't / can；对过去不确定的推测用 could / might have done（语气弱于 must have done，后者只用于肯定）。

二、高考真题分析

【真题1】(2017·江苏卷#22)

________ not for the support of the teachers, the student could not overcome her difficulty.

A. It were B. Were it C. It was D. Was it

解析：考查虚拟语气倒装。句意"要不是老师们的支持，该生无法克服困难"，对现在虚拟 be 用 were；省略 if 时把 were 提至句首 → Were it not for...。选 B。

答案：B

【真题2】(2017·天津卷#11)

Ten days are devoted to this training program and ________ it be unsuccessful, it could be repeated later.

A. should B. could C. might D. would

解析：考查与将来相反的虚拟条件句省略 if 的倒装。句意"若计划不成功，以后可重做"，Should it be... = If it should be...，将 should 提前构成倒装。选 A。

答案：A

【真题3】(2012·辽宁卷#33)

Jack is a great talker. It's high time that he ________ something instead of just talking.

A. will do B. has done C. do D. did

解析：It's high time 后从句用虚拟语气，谓语用一般过去时（或 should do，should 不省）。此处用 did，暗含"早该做却光说不做"的催促。选 D。

答案：D

【真题4】(2012·北京卷#35)

Don't handle the vase as if it ________ made of steel.

A. is B. were C. has been D. had been

解析：as if 引导与现在事实相反的虚拟，花瓶并非钢制，be 用 were。选 B。

答案：B

【真题5】(2019·天津卷)

Mary's description of the party was so vivid that I felt as if I ________ there.

A. would be B. might have been C. would have been D. had been

解析：felt 表明主句为过去时，as if 后"我好像去过"是对过去的虚拟，用过去完成时 had been。选 D。

答案：D

【真题6】(2018·江苏卷#24)

It's strange that he ________ have taken the books without the owner's permission.

解析：在 "It is strange that..." 主语从句中用 should + 动词原形，此处 should 表"竟然、居然"的惊讶语气，区别于建议要求类的虚拟。填 should。

答案：should

【真题7】(2018·天津卷#10)

I can't find my purse. I ________ it in the supermarket yesterday, but I'm not sure.

A. should leave B. must have left C. might leave D. could have left

解析：yesterday 表对过去的推测，用"情态动词 + have done"；but I'm not sure 表明是不确定的推测，用 could have left（可能落下）。选 D。

答案：D

【真题8】(2018·北京卷#13)

They ________ (find) a better hotel if they had driven a few more kilometers.

解析：主句与过去事实相反（if 从句 had driven），主句用 might / could have found，意为"本可能找到更好的旅馆"。填 might have found。

答案：might have found

三、模拟题解答

【模拟1】________ there no modern telecommunications, we would have to wait for weeks to get news from around the world.

A. If were B. Were C. Being D. To be

解答：Were there no... = If there were no...，省略 if 把 were 提前，与现在相反。选 B。

答案：B

【模拟2】The baby laughs happily as if he ________ (hear) some funny story.

解答：as if 对现在虚拟，动词用一般过去时；hear 的过去式 heard（或用 were hearing）。填 heard。

答案：heard（或 were hearing）

【模拟3】It's high time that we ________ (take) effective measures to reduce air pollution.

解答：It's high time 后接过去式或 should do（should 不省）。填 took（或 should take）。

答案：took（或 should take）

【模拟4】He looks worried; something ________ (go) wrong with his plan, I'm afraid.

解答：looks worried 是有依据的肯定推测，指现在"一定出了岔子"，用 must have gone（对已经发生的坏事作肯定推测）。填 must have gone。

答案：must have gone

四、同步学习建议

第三轮复习重在"题型归纳"而非重背。建议做两件事：第一，把四大特殊句型（省略 if 倒装 / as if / It's time / 主语从句 should）做成一张"触发词 → 动词形式"速查卡；第二，把情态推测按"肯定 must / 不确定 could·might / 否定 can't"三档配例句，重点区分 could have done（可能做过）与 must have done（一定做过）的把握程度差异。

每天 15 分钟，做 5 道混合小题，错题务必标注"倒装 / 特殊句型 / 推测把握度"。坚持一周，这类题基本不失分。下阶段我们将进入《状语从句与连词》，记得关注本号更新。