affirmative
I (eat).
I have eaten.
I (eat)
I have not eaten.
you eat?
Have you eaten?
I have already/yet eaten.
already
I lose my keys yesterday.
I lost my keys yesterday.
She (finish) her homework.
She has finished her homework.
He (call) me.
He has not called me.
She arrive.
Has she arrived?
He as called you yet/already?
yet.
She arrive ten minutes ago.
She arrived ten minutes ago.
We (see) that movie.
We have seen that movie.
We (meet) before.
We haven't met before.
They finish the test
Have they finished the test?
Have they arrived yet/already, or are they still on the way?
yet
We visit London twice.
We have visited London twice.
They (travel) to Paris.
They have travelled to Paris.
She (do) her project yet.
She hasn't done her project yet.
Your teacher checked the homework.
Has your teacher checked the homework?
He has already/yet finished the report before the deadline.
already
He never eat sushi before.
He has never eaten sushi before.
My brother (work) in three countries since 2020.
My brother has worked in three countries since 2020.
The students (complete) their assignments since last week.
The students haven't completed their assignments since last week.
You ever be to another country for a competition.
Have you ever been to another country for a competition.
They have already/yet decided where to spend their vacation this year.
already.
They work on the previous project last year.
They worked on the previous project last yer.