虚拟语气从句中 should 可以省略的情况
1. 在建议,要求,命令,想法后的动词后的从句 （宾语从句） 里, 用 should + 动词原形, should 可以省略。 如： advise, agree, command, decide, demand, determine, grant, indicate, insist, order, propose, requ
est, require, suggest. 如： ⑴ His doctor suggested that he (should) take short leave of absence. ⑵ The author proposed that TV (should) be turned off at least one hour every day. 2. 在建议,要求,命令,想法后的名词后的从句 （表语从句， 同位语从句） 里, 用 should + 动词原形, should 可以省略。 如： advice, agreement, command, decision, demand, determination, indication, insistence, order, proposal, request, requirement, etc. 例如： ⑴ It was Bill’s suggestion that everyone (should) have a map. ⑵ His suggestion was that everyone (should) have a map. ⑶ He gave us a suggestion that everyone (should) have a map. 3. 在 It is/was +形容词（或名词）后的 that 从句中用 should 的结构, should 可以 省略。 句型结构如：It is suggested / important / demanded / necessary / a pity /…+ that… ⑴ It is suggested that we (should) hold a meeting next week. ⑵ It is necessary that he (should) come to our meeting tomorrow. 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, vital etc. 例如： ⑴ It's natural that she (should) do so. ⑵ It is essential that we (should) tell her the news. 4. 在 lest 和 for fear that( 以免) , in case (以防)从句中用 should, should 可 以省略。 例如： ⑴ She walked quietly lest she (should) wake up her roommates. ⑵ Have your gun ready in case we should need it.
1. 大家把工作做好是很重要的。 2. 她现在很勤 奋，生怕英语不及格。 3. 小王建议放学后打篮球。 4. 要求两年内建成这座桥。