I learned future prefect!!

This grammar makes me a little confused.
Because it explains two different future things.

For example,
『I will have gone to NewYork before I finish studying at an international language school.』

Do you know this mean?
It means that first sentence explains first latest future thing and second sentence does second future thing.
They are future things.
However you have to carefully read this sentence.
Because they will happen different time!!

At first,
I will go to NewYork.

After that,
I will finish studying at an international language school.

Yes.You know this grammar is too difficult!!kkk


Let's make other sentences!!

*My friends will have arrived at the school by the time I get on a train.

*I will have been sleeping by this time tomorrow.


I will have turned off the light in my room before I sleep a lot.