If Tom ____(study)harder before,he____(pass)the examination last week.

If Tom ____(study)harder before,he____(pass)the examination last week.
英语人气:986 ℃时间:2019-09-29 14:50:52
优质解答
had studied;would have passed
考察虚拟语气,与过去事实相反,从句谓语用had+过去分词;主句谓语用would/should/could/might + have + 过去分词
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