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Could you recommend me any grammar taskbook like Murphy with a lot of tasks and explanation of perfect tense? I haven't quite understood the meaning of the perfect tense and all cases when it should be used. I have to train much more...

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closed as not constructive by choster, aedia λ, Hellion, MετάEd, cornbread ninja 麵包忍者 May 30 '13 at 19:38

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I don't know of any grammar taskbook that will go through the uses correctly; they're mostly useful for practicing mechanical tasks like producing the correct form of have and the past participle of the next verb in the chain. The best discussion of the English Perfect Construction (not a "tense", really) is McCawley's famous 1971 paper "Tense and Time Reference in English", summarized here. –  John Lawler May 30 '13 at 16:55
    
Sometimes it's really needfull to go through a lot of tasks on the same theme. –  user2431907 May 30 '13 at 21:02
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