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Should have + past participle
The structure should have + past participle can be used to talk about past events which did not happen.
This structure can also be used to talk about past events which may or may not have happened.
We can use should not have + past participle to refer to unwanted or unnecessary things that happened.
Should or Would?
In British English, both would and should can be used after first person pronouns (I and we). There is no difference in meaning.
Should after why
Should can be used after why to suggest surprise.
Should in subordinate clauses
Should can be used after certain adjectives expressing personal judgments and reactions. Examples are: odd, strange, sad, unfair etc.
This also happens after adjectives and nouns expressing the importance of an action. Examples are: necessary, important, essential, vital, eager etc.
Should can used after so that, in order that, for fear that, in case and lest to show the purpose of an action.
Should in conditional clauses
Should is used in conditional clauses expressing possibilities, suppositions etc.
Note that if he should come indicates less likelihood of his coming than if he comes. The sentence means something like this: There is not much chance of his coming. But if he turns up, ask him to wait.
|Category: Primary auxiliary verbs. Modal auxiliary verbs | Added by: Teacher_Koce (2014-01-05)|
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