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John and Mike asked me to have a drink with them.I said it w

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John and Mike asked me to have a drink with them.I said it was at least ten years since I_____a good drink.标答是had enjoyed.可不可以用enjoyed 为什么?
还有Thank you for all your hard work last week.I don't think we_____it without you.标答是could have managed ,这里可不可以用can manage.为什么?
It's high time that all of you _____a rest.标答是had 为什么?可以用should have
John and Mike asked me to have a drink with them.I said it w
1、since 后多用完成时,考虑到前面是was,过去式,所以后面用过去完成时
2、这是一种虚拟,对过去情况的虚拟,有了你的帮助,我们才能完成工作,如果没有你的帮助.应该用完成时态,没有你的帮助,我们不可能完成某事
3、it's high time+过去式是固定句型.是做某事的时候了