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 marketing department.
(6) 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第三人称为主。除了口气凶悍之外,有时还语带讽刺,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,必须注意下列几点:
一、"let" 的否定句有二。如果宾语是第三人称用"Don't let....."(见例(9));如果宾语是第一人称,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 promoted.
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:
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