英语中表猜测的句子有没有过去时态比如句子中含有must、might、may、can't这些表猜测的词,句子有没有过去时态?

Question

英语中表猜测的句子有没有过去时态
比如句子中含有must、might、may、can't这些表猜测的词,句子有没有过去时态?

Answer 1

有的；例如 Mr Smith must be at home now.He can't be from England (表状态)
Mr Smith can't be having lunch now.It's only 10:30 (对现在动作的推测)
Mr Smith couldn't have gone to the concert last night.(对过去动作的推测)