17.Let’s go to the zoo! 我们去动物园吧!
一、由let带头的祈使句是个常见的动词句型,它的主要用法有下列三种: 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: Let me try. Let's do it. Let me go and look for it. 这个句型语气委婉,比直接的祈使句客气。试比较a、b两句: a. Don't disturb him. b. Let's not disturb him. a是直接命令,语气强烈,不如b温柔悦耳。 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: Let Robert take charge of the marketing department. Let her join our choir. 3)表示“警告”、“蔑视”、“威胁”等。 这种祈使句里的宾语也是以第三人称为主。除了口气凶悍之外,有时还语带讽刺,如: Let him try and he will expose his inability to work on his own. Let the invaders come and our armed forces will wipe them out in no time. 二、用“let”的祈使句时,必须注意下列几点: 1)let的否定句有二。如果宾语是第三人称用“Don't let...”;如果宾语是第一人称,则用“Let......not”。如: Don't let this type of things happen again. It's raining now. Let's not go out until after the rain. 2)let只适用于现在时态,可以有被动语态 (the passive voice)。如: Let the recalcitrant criminals be sent to prison. Let all the dedicated capable staff be promoted. 3)let后头除了是不带“to”的不定式动词之外,还可以是某些适当的副词,如out, in, down, alone等。如: Let the puppy out. Open the windows and let the fresh air in. The room is too sunny. Let the blinds down. Let me alone, please. 4)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: Let's try it, shall we? Let us do it by ourselves, will you? |
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