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1、 英语四级词汇辅导:let引导的祈使句1.表示“建议”。这个句型里的“let“后头紧跟着一个第一人称的代词宾语,如:(1) Let me try.(2) Let”s do it.(3) Let me go and look for it.这个句型语气委婉,比直接的祈使句客气。试比拟(4)a和(4)b:(4) a. Don”t disturb him.b. Let”s not disturb him.(a)是直接命令,语气剧烈,不如(b)温顺动听。 2.表示“间接命令”或“愿望”。这句型里的动词宾语是第三人称名词或代词,如:(5) Let Robert take charge of the ma
2、rketing department.(6) Let her join our choir. 3.表示“警告”、“蔑视”、“威逼”等。这种祈使句里的宾语也是第三人称为主。除了口气凶悍之外,有时还语带挖苦,如:(7) Let him try and he will expose his inability to work on his own.(8) Let the invaders come and our armed forces will wipe them out in no time. 用“let“的祈使句时,必需留意以下几点:一、“let“ 的否认句有二。假如宾语是第三人称用“Don
3、”t let.“(见例(9);假如宾语是第一人称,则用“Let.not“ (见例(10):(9) Don”t let this type of things happen again.(10) It”s raining now. Let”s not go out until after the rain. 二、“Let“只适用于现在时态,可以有被动语态 (the passive voice),如:(11) Let the recalcitrant criminals be sent to prison.(12) Let all the dedicated capable staff be pr
4、omoted. 三、“Let“后头除了是不带“to“的不定式动词 (The infinitive without“to“)之外,还可以是某些适当的副词,如out, in, down, alone等:(13) Let the puppy out.(14) Open the windows and let the fresh air in.(15) The room is too sunny. Let the blinds down.(16) Let me alone, please. 四、用“Let”s“时,把谈话者的对象包括在内;用“Let us“时,并不包括对方,如:(17) Let”s try it, shall we?(18) Let us do it by ourselves, will you?从(17)里的“shall we“和(18)里的“will you“,不难知道前者包括听话人,后者并没有。