英语北师大版一轮复习讲练：Part II 语法部分专题11 情态动词和虚拟语气_高考复习指南

　　She will stand there sleeping for hours. (表示某种倾向或习惯性动作)

　　6．should

　　You shouldn't be so careless. (表义务，意为“应该”，用于各种人称)

　　They should have arrived in Beijing by this time. (表推测，意为“想必一定、照说应该、估计”等)

　　It is simply a miracle that rice should grow in such a place. (表示语气较强的意为“假设；万一；竟然”)

　　7．would

　　I said I would do anything for you. (表意愿)

　　Would you please tell me the way to the nearest bus stop? (表委婉地提出请求、建议或看法)

　　When he had a problem to solve, he would work at it until he found an answer. (表过去反复发生的动作或过去的一种倾向)

　　8．ought to

　　I really ought to phone my mother.(表义务，意为“应该”，口气比should稍重)

　　There's a fine sunset; it ought to be a fine day tomorrow. (表推测，暗含很大的可能，语气较弱)

　　9．used to

　　There used to be a building at the street corner, but it has been pulled down. (表示过去的习惯动作或状态，现在不再发生或不复存在)

　　I usedn't / didn't use to smoke. (否定式)

　　Used you (Did you use) to go to school on foot? (疑问式)

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