虚拟语气在从句中用should的情况:

　　1.在表示建议,要求,命令,想法的动词后的从句里,用should+动词原形,should可以省略.如advise,agree,command,decide,demand,determine,grant,indicate,insist,order,prefer,propose,request,require,stipulate,suggest,urge,vote.常考到的是:suggest,advise,demand,require,propose,insist,order,request.

　　Hisdoctorsuggestedthathe(should)takeshortleaveofabsence.

　　2.在表示建议,要求,命令,想法的名词后的从句里,用should+动词原形,should可以省略.如advice,decision,agreement,command,decree,demand,determination,indication,insistence,order,preference,proposal,request,requirement,stipulationetc.

　　ItwasBill’ssuggestionthateveryone(should)haveamap.

　　3.在Itis/was+形容词后的that从句中用should的结构,should可以省略.这类形容词常见的有:advisable,anxious,compulsory,crucial,desirable,eager,essential,fitting,imperative(绝对必要),impossible,improper,important,natural,necessary,obligatory,possible,preferable,probable,recommended,urgent,vitaletc.

　　It‘snaturalthatshe(should)doso