What is the difference?

[Unregistered]

What is the difference between the use of "to have +perfect" and "to + infinitive" in the following sentences?

"We were honoured to have invited our Secretary for Justice to give the opening speech.
We were honoured to invite our Secretary for Justice to give the opening speech."

[albertino]

What is the difference between the use of "to have +perfect" and "to + infinitive" in the following sentences?

"We were honoured to have invited our Secretary for Justice to give the opening speech.
We were honoured to invite our Secretary for Justice to give the opening speech."

Well, the differences in the use of "to + infinitive" and "to + have + perfect" are:
Using "to + infinitive":
(i)if the action/state expressed by the "to+infinitive" is subsequent to that of the main verb; or
(ii)if the action/state expressed by the "to+infinitive" takes place at the same time (or being co-existence) with that of the main verb.
Using "to + have + perfect"
If the action expressed by the "to + have + perfect" takes place before that of the main verb.
So, do you know the answer now?
(Not a teacher)