Помогите срочно!! 10 предложений презент пёрфикт и таки еже паст симпл. В зарание спасибо :-)

Present Perfect: I already bought milk. I have never been to China. I have cleaned my room. I have become a millionaire, I have not had breacfast yet. I have done my lessons. We have not seen her for a long time. Grandmother with grandfather have already visited their grandchildren. I have not been in Africa. He has done everything for her.