l___all the cooking for my family .but rencently l’ve been too busy to do it do 为什么不可以使had done 表示过去曾经做过饭呢?When he ___the door ,he found his keys were nowhere .答案是was to open 说这事过去将来时.不理

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l___all the cooking for my family .but rencently l’ve been too busy to do it do 为什么不可以使had done 表示过去曾经做过饭呢?When he ___the door ,he found his keys were nowhere .答案是was to open 说这事过去将来时.不理
l___all the cooking for my family .but rencently l’ve been too busy to do it
do 为什么不可以使had done 表示过去曾经做过饭呢?
When he ___the door ,he found his keys were nowhere .
答案是was to open 说这事过去将来时.不理解为什么这么用

l___all the cooking for my family .but rencently l’ve been too busy to do it do 为什么不可以使had done 表示过去曾经做过饭呢?When he ___the door ,he found his keys were nowhere .答案是was to open 说这事过去将来时.不理
第一道题:做饭时我经常反复的动作,因此用一般现在时
第二道题:首先主语he的动作发生在过去,对比前半句话“要打开门”,和后半句话“发现没钥匙”可知因为没有钥匙而没有开门,这就说明后半句话中“钥匙不见了”这个动作发生在前半句话的后边,所以前半句话“准备打开门”是过去将要发生但没发生的动作,因此用过去将来时

第一句话是说明了做饭是我一直做得事就是一种“习惯性”的动作时一般式,只是最近没做原来一直都有这个行为所以用一般式
he found his keys “were” nowhere,were就表明发生在过去。而开门是在他发现钥匙丢了之后所以用过去将来。