Помогите пожалуйста с английским.упражнение 2 и 3

 1. I've been typing the whole evening. I've already typed twenty pages. 2. We've been taking the test for 50 minutes. Some students have finished it. 3. Have you been waiting for me for long? No, I've just come. 4. What have you been doing this morning? - We been plantin 'em trees in da garden. - How many trees have you planted? - Nine 5. I've been translanting the article for two hours but haven't translated it yet. 6. The surgeon has been performing an operation for three hours but hasn't finished it yet.