They / not see that movie. (YET)
They haven't seen theat movie yet.
I / not have any coffee (YET)
I haven't had any coffee yet.
They / buy their maths books. (ALREADY)
They have already bought their maths books.
We / see that movie (ALREADY)
We have already seen that movie.
I / not read his new book (YET)
I haven't read his new book yet.
He / not finish his homework (YET)
He hasn't finished his homework yet
I / eat breakfast (ALREADY)
I have already eaten breakfast
I / not meet his wife (YET)
I haven't met his wife yet.
You / finish your homework ? (YET?
Have you finished your homework yet?
The movie / start (ALREADY)
The movie has already started.