用现在完成时造句

1.He has already come to my place.
2.It has not yet cost us much money.
3.The grass in this field hasn't ever been cut.
4.We have done our homework just before your arrival.
5.He has drawn the same picture twice.
6.I have dreamed for this moment for 20 years.
7.She hasn't drunk any alcohol since she was caught drunk driving by the police.
8.I have been driving a lot recently.