用can't have been造句!
You can't have been studying all morning.I saw you playing outside.
用can't have been造句！！！~
用canx27t have been造句！！！~谢谢！！这个意思是，本不能够，不能做，却做了。
you can't have been out ,because you must look after you sick mather .
you can't have been out ,because you must look after you sick mather .
can't have been
canx27//www.souquanme.comt have been, must have been 结构里是不是不要把have been当现在完成时看，就把它当成一个结构来使用？可以详细给我讲一下这个结构吗？非常感谢！have用于“情态动词＋have＋过去分词”的结构，有
推测、假设之意。
1.must＋have＋过去分词，表示对过去时间发生的动作或存在的情况的推测，一般用于肯定句。
Her father thought that she must have met a fairy.
You must have left your bag in the theatre.
2.can(could)＋have＋过去分词，表示对过去发生事情的“不肯定”，常用于否定句和疑问句。
He can't have been to your home,he doesn't know youraddress.
3.shouldwww.souquanme.com＋have＋过去分词，表示“某事本该早做而实际未做”，用于肯定句。
You should have been here five minutes ago.
推测、假设之意。
1.must＋have＋过去分词，表示对过去时间发生的动作或存在的情况的推测，一般用于肯定句。
Her father thought that she must have met a fairy.
You must have left your bag in the theatre.
2.can(could)＋have＋过去分词，表示对过去发生事情的“不肯定”，常用于否定句和疑问句。
He can't have been to your home,he doesn't know youraddress.
3.shouldwww.souquanme.com＋have＋过去分词，表示“某事本该早做而实际未做”，用于肯定句。
You should have been here five minutes ago.
he can't have been
He canx27t have been ill是现在//www.souquanme.com完成时? 是现在完成时? 那可以不可以He have canx27t been ill? 还是必须放前面? 是猜测晓得了额,CANx27T BE.. 但是不是现在完成时吗,为什么不是HAVE放前面呢?can't have done .用于表示对过去发生的事进行猜测,不可以He have can't been ill?
首先你应该知道什么是现在完成时 have done.can是情态动词,情态动词＋完成时和完成时本身的意义是不一样的.have后面可以加副词但不能加情态动词.
首先你应该知道什么是现在完成时 have done.can是情态动词,情态动词＋完成时和完成时本身的意义是不一样的.have后面可以加副词但不能加情态动词.
can't have been和must have been
每一个的用法O(∩_∩)O谢谢啦只要记住这:
must have been ... 那时一定是can't have been... 那时不可能是
再好好理解这几人句子,相信你就理解啦.
He can't have been ill. He must have been tired.
She can't have been forty. She must have been fifty.
He can't have been the youngest. 搜趣网He must havwww.souquanme.come been the oldest.
He can't have been listening carefully.He must have been dreaming.
must have been ... 那时一定是can't have been... 那时不可能是
再好好理解这几人句子,相信你就理解啦.
He can't have been ill. He must have been tired.
She can't have been forty. She must have been fifty.
He can't have been the youngest. 搜趣网He must havwww.souquanme.come been the oldest.
He can't have been listening carefully.He must have been dreaming.
