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Vladv Posted 8 years ago
Grammar

Could have behaved

«I think only English people could have behaved so oddly as you, in postponing your marriage without reason for two mortal years.»
Dear native speakers, can't understand the use of Could have behaved, is it a part of third conditional ? I can't see it . Why can't I say " could behave " with the same meaning
  

Top answer

"could have behaved" is talking about possibility in the past. "could behave" is talking about possibility in the present, or general possibility (at any time). In your sentence there is no significant implied condition.

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1 Answers
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"could have behaved" is talking about possibility in the past. "could behave" is talking about possibility in the present, or general possibility (at any time). In your sentence there is no significant implied condition. In your sentence both "could have behaved" and "could behave" are possible, depending