Present Perfect (functions)
Billy is twelve years old, and his sister is fifteen. It was Saturday yesterday, and Billy's father gave him fifty pence.
There is a big tree in Billy's garden, and he climbed it and sat in it. He likes that place in the tree very much. Then Billy looked at his fifty pence and said, “I'm going to go to the market tomorrow on my bicycle, and I'm going to buy some seeds with this money.
Then I'm going to plant them under this tree. I'm going to have a lot of flowers and fruit and plants, and I'm going to sell them.
“A lot of people are going to come to my garden every day, and they're going to buy my nice flowers and fruit and plants, and in the end I'm really going to have a lot of money.
Then I'm going to grow up and go to university, and I'm going to be a doctor.
Then my sister will come to me and say, 'Doctor, Doctor, I've broken my left arm! Please help me!' And I'm going to set her arm.”
The sky was blue, the weather was hot, and Billy was tired after that, so he went to sleep in the tree. But then he fell out of the tree and broke his left arm. His mother took him to the doctor, and she set it.
Как изменится ситуация: Then my sister will come to me and say, 'Doctor, Doctor, I've broken my left arm! Please help me!'” если заменить Present Perfect на Past Simple: 'Doctor, Doctor, I broke my left arm! Please help me!'“? Какой смысл приобретает фраза Please help me!?