不可以。as if 从句谓语用would do表示将要做某事的样子,用had done表示做了某事的样子。不会出现would have done这种形式,因为它不符合逻辑。
He staggered towards the door as if he would fall/were to fall at any moment.
His face was pale as if he had just seen a ghost.
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