Напишите пожалуйста 10 предложений з to be (5 предложений отрицательных и 5 положительных)

положительные- 1.We have bought a new TV set. 2.The students have left the room. 3.The train has just arrived. 4.He has written about a hundred novels. 5.I have already bought that book. отрицательные- 1.I have not written the letter. 2.I had not written the article. 3.I should not have written the test work. 4.She hasn't written the test yet. 5.He hasn't phoned this afternoon.