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Grammar problem

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电梯直达

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发表于 2016-2-13 02:57 PM |只看该作者 |倒序浏览

S1. John [was] eaten by lions

S2. I [have] eaten my dinner

this 2 example is correct sentence

i always confused with grammar,why does the sentense1 use paste tense,but sentense 2 dont?

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Saika4869

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发表于 2016-2-13 03:34 PM |只看该作者

John was eaten by lions
Lions have eaten John
I have eaten my dinner
My dinner was eaten by me

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crayonstamp

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发表于 2016-2-13 04:28 PM |只看该作者

S1. John [was] eaten by lions
   First sentence，in my humble opinion, it means the event happened in past. The sentence 'John
   has been eaten by lions' indicates that it happened in past and still remains as a fact until now.

S2. I [have] eaten my dinner
   It means you mention that you have taken your meal at the point you spoke it out. Alternatively, 'I
   had eaten my dinner when the bus arrived' emphasis that you have finished your dinner before the
   arrival time of the bus.

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czhi

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发表于 2016-2-13 04:55 PM |只看该作者

S1 passive sentence
S2 active sentence

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ENGLISHPROBLEM

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发表于 2016-2-13 04:58 PM |只看该作者

thanks a lot

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qwerty_ky

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发表于 2016-2-14 02:36 PM |只看该作者

first sentence is past tense+passive, so use was/were+verb(past tense)
second sentence is present perfect tense+active, so use have/has+verb(past participle)