第 5 讲 情态动词和虚拟语气[小题夯基练]单句语法填空1．They ________ (arrive) at suppertime but their flight was delayed.解析：should have arrived [should have done sth.意为“(过去)本应该做某事而未做”，分析句意可得出答案。]2．Maybe if I ________ (study) science，and not literature then，I would be able to give you more help.解析：had studied [根据 then 一词可确定此处表示与过去事实相反，故 if 引导的从句部分用 had done 形式。]3．Teachers recommend parents ________ (not allow) their children to watch too much TV.解析：(should) not allow [recommend，suggest，advise，order，request，insist 等表示“建议、命令、要求”等意思的动词，后接宾语从句时，宾语从句的谓语动词常用“should＋动词原形”，should 可省略，此处表示老师建议家长不允许孩子看太多电视。]4．He always acts as if he ________(know) everything.解析：knew [在 as if 引导的方式状语从句中，用一般过去时表示与现在事实相反。]5．If we had taken such effective measures much earlier，the river ________ (not pollute) so seriously now.解析：would not be polluted [从句表示与过去事实相反，由 now 可知，主句表示与现在事实相反，故主句谓语动词用“would＋动词原形”，且 river 与 pollute 构成被动关系。]6．—What will you do during the summer holiday?—I don't know，but it's high time that I ________ (decide) something.解析：decided/should decide [在 It's (high) time that...中，that 从句应用虚拟语气，从句谓语用 should do 或过去式。]7．—Where have you been?—I ________ (stick) in the heavy traffic.Otherwise I ________ (come) here earlier.解析：was/got stuck；would have come [第一空表示过去的一个客观事实，用一般过去时；第二空表示与过去相反的虚拟语气主句用 would have done 结构。]8．—Would you mind if I set out earlier tomorrow morning?—Well，I would rather you ________ (not do)．解析：didn't [would rather 后的宾语从句需用虚拟语气，表示与现在或将来事实相反，谓语动词用一般过去式...
