at odds with与…不和, 与…争吵
例句:She is at odds with her boss.
她与上司不和。
Local media have speculated that it could have been a suicide bomber.
could have猜测
1)may / might have 过去分词”表示对已发生的动作或存在的状态进行不肯定的推测,might的语气比may弱一点。这种结构主要用于肯定句和否定句,疑问句改用can或could。如:
They may not have known it beforehand.
You might have read about it in the papers.
2)“must have 过去分词”表示对过去发生的事情或状态进行推测,语气比较坚定,通常只用于肯定句。如:
It must have rained last night, for the ground is wet.
You must have been mad to speak to the servant.
3)“can / could have 过去分词”表示对过去某种情况的怀疑或不确定。can和could一般用于否定句和疑问句,could的语气较can弱。如:
I didn't see her at the meeting this morning; she can't / couldn't have spoken at the meeting.
He can't have finished the work so soon.
4)“should / ought to have 过去分词”表示过去本该做某事但没做,其否定式表示过去不该做某事但做了,这种句式含有不满或责备之意,ought to的语气比should强一些。如:
You ought to / should have studied harder. 你本应该更努力学习的。(但没有)