Après (without que) is usually followed by a noun or an infinitive, but not a subject. With the addition of que, you can have a different subject in the après-clause than the main clause.

Après le dîner je vais aller me coucher. -- After dinner, I am going going to bed. (Same subject between the two clauses -- je)
Après avoir fini le dîner, je vais aller me coucher. -- After having finished dinner, I'll go to bed. (Again, je is the common subject of the two clauses.)
Tu vas aller te coucher après que nous avons fini le dîner. -- You'll go to bed after we have finished dinner. (Here the subject between the main clause -- tu -- is different from the one in the subordinate clause -- nous).

Hi sir chris.I want to ask a question.Can we use "le futur proche" when the subordinate clause is passe compose? if it is possible what does it mean?(habit or something different?) according to the information given in the above we can use simple present in the main clause and passe compose in the subordinate clause. but why did you use le futur in the main clause?

Isn’t it "You’re going to go to bed"?

Isn’t it "You’re going to go to bed"?