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虛擬條件句的三種基本類型

一、與現(xiàn)在事實(shí)相反

若與現(xiàn)在事實(shí)相反，條件從句的謂語用過去式(be通常用were)，主句謂語用“should (would, could, might)+動(dòng)詞原形”：

If you took a taxi，you’d get there quicker. 如果你坐出租車去，你可以快一點(diǎn)到那里。(但你不坐)

If I knew her number I could ring her up. 要是我知道她的電話號(hào)碼，我就可以給她打電話了。(可惜我不知道)

二、與過去事實(shí)相反

若與過去事實(shí)相反，條件從句的謂語用過去完成時(shí)(had+過去分詞)，主句謂語用“should (would, could, might)+have+過去分詞”：

If I’d left sooner，I’d have been on time. 要是我早點(diǎn)動(dòng)身，我就準(zhǔn)時(shí)到了。(但我動(dòng)身太遲了)

If we had found him earlier we could have saved his life. 要是我們當(dāng)時(shí)早點(diǎn)找到他的話，我們就可以救活他。(可惜我們找到他太晚了)

三、與將來事實(shí)相反

若與將來事實(shí)相反，條件從句的謂語用過去式(be通常用were)，主句謂語用“should (would, could, might)+動(dòng)詞原形”：

If he went，would you go too? 如果他去，你也去嗎?(大概他不會(huì)去)

If I asked him，I’m sure he’d help us. 如果我向他提出要求，肯定他會(huì)幫助我們。(不過我不打算這樣做)

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