Dear teacher,
I' m always confused about using 'to have' , I know it is a perfect infinitive but the meaning of it must have different using instead of ' to+verb'!
If you go there you need to have registered a room (why it is not just "to" before register?).
&
it would've been possible to have met him if you'd been there.
&
To appreciate the success, you need to have had the failure. (Why not just "to have")
Thanking you
Scottish
All three perfect infinitives are used to make clear that that event precedes the action in the main clause.
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All three perfect infinitives are used to make clear that that event precedes the action in the main clause.