Have you spoken to your teacher? (yet)
Have you spoken to your teacher yet?
We've been to the museum. (just)
We've just been to the museum.
Hasn't he finished his homework? (yet)
Hasn't he finished his homework yet?
They've written the blog post. (already)
They've already written the blog post.
Wow, have you finished cleaning? (already)
Wow, have you already finished cleaning? / Have you finished cleaning already?
They've had their lunch. (already)
They've already had their lunch.
I've come home from school (just)
I've just come home from school.
I haven't done my homework. (yet)
I haven't done my homework yet.
I've eaten breakfast. (already)
I've already eaten breakfast.