as if (as though)若表示與現(xiàn)在事實相反，謂語動詞用一般過去時;若表示與過去事實相反，用過去完成時;表示將來的可能性不大，用would (might, could)+動詞原形。

它的常規(guī)用法相信同學們都很熟悉，今天牛津英語要跟大家強調(diào)兩點罕見情況。

(1) 從句所表示的內(nèi)容若為事實或可能為事實，也可用陳述語氣：

It looks as if we'll be late. 我們似乎要遲到了。

This meat tastes as if it has already gone bad. 這肉吃起來似乎已經(jīng)壞了。

在現(xiàn)代英語中，有時即使從句內(nèi)容不是事實，也可能用陳述語氣：

I feel as if [as though] I'm floating on air. 他感到好像飄蕩在空中。

The stuffed dog barked as if it is [were, was] a real one. 玩具狗叫起來像真狗。

(2) 注意 It isn't as if…的翻譯：

It isn't as if he were poor. 他不像窮的樣子(或他又不窮)。

It isn't as if you were going away for good. 又不是你離開不回來了。

來源：高三網(wǎng)