Youtheflower,butyoudidn't.答案是aresupposedtohavewater,而我选的那项是weresupposedtowater后面不是did过去式吗,前面也应该用过去式吧

Question

You ______ the flower,but you didn't.答案是are supposed to have water,而我选的那项是were supposed to water
后面不是did过去式吗,前面也应该用过去式吧

Answer 1

这里考“虚拟语气”,这个比较难,我尽量给你解释.
简单的说,虚拟语气有2大类,一种是“现在的虚拟”,一种是“过去的虚拟”.
你看题目应该很容易发现,题目是“过去虚拟”.这个我相信你很好理解.
好,我们继续.
1.解释“现在的虚拟”——表示对现在发生的事情的假设.
例：李雷希望自己是一个百万富翁.Li Lei wishes he were a millionaire.
韩梅梅看起来似乎从不知疲倦.It looks as if Han Meimei were never tired.
特征：“但愿”,“希望”,之类字眼可以看出是假设,这个不难,be动词一律用were,这个你要记住.
2.解释“过去的虚拟”——表示对过去发生的事情的假设.
例：吉姆刚才没有给花浇水,他刚才应该要这么做的.（浇水的吗?没有!）
Jim didn't water the flowers. He is supposed to have watered them.
如果我昨天邀请的露西的话,她今天会过来的.
If I had invited Lucy yesterday, she would have come today.
简单说说用法和特征,“过去的虚拟”有个公式,
从句用 if + 过去完成时,主句用 would + 现在完成时.
记一下吧.
高中常考这个.
你,写题目的时候,
You ______ the flower,but you didn't.答案是are supposed to have water,
最后那个单词,忘记了加上ed.
英语其实不难,就是被很多教授搞难了.哎~~