Нужно составить:

отрицательную форму, общий вопрос, специальный вопрос, разделительный вопрос и вопрос к подлежащему

1) He has just cleaned his room.

2) They went to America last year.

отрицание - he hasn't just cleaned his room.

общий вопрос - has he just cleaned his room?

специальный вопрос - what has he just cleaned?

разделительный вопрос - he has just cleaned his room, hasn't he?

вопрос к подлежащему-

who has just cleaned the room?

отрицание - they didn't go to Amirica last year.

общий вопрос - did they go to Amirica last year?

специальный вопрос - where did they go last year?

разделительный вопрос - they went to Amirica last year, didn't they?

вопрос к подлежащему-who went to Amirica last year?

He hasn't just cleaned his room. Has he just cleaned his room? What has he just cleaned? He has just cleaned his room, hasn't he? Who has just cleaned the room?

They didn't go to America last year. Did they go to America last year? When did they go to America? They went to America last year, didn't they? Who went to America last year?