It is used after catenative verbs that take an infinitive complement. It is rare (and sometimes very formal). In that situation, you would have needed to have given your positive consent.
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It is used after catenative verbs that take an infinitive complement. It is rare (and sometimes very formal).
In that situation, you would have needed to have given your positive consent.
Previously, the DNA needed to have been frozen or buried in a layer of permafrost to be retrievable for analysis.
To save money on 2010 taxes, a purchase needed to have been made by last Fr