Have you ever seen a ghost? No,I haven’t.
Has your friend ever taken part in a swimming competition? Yes, he has.
I have never tried Portuguese cuisine.
My friend has never been to New York.
I have just passed my exam.
He has just done his homework.
I have already read “ Romeo and Juliet “.
She has already had lunch.
I haven’t written an essay yet.
My friend hasn’t gone to the gym yet.
Have you heard the news yet? No,I haven’t.
Has she met her cousin yet? Yes, she has.