The changing focus one:

In this one single shot I firstly focus on Polly’s profile, then I change focus to Kai’s face, in this part , I think I did kind of good job. However, when I start panning to Evelyn, the problem growly emerging. The obvious one problem is the space between Kai and Evelyn. This distance between them seems a bit of long, so the viewers will feel confused when they see the long white wall. I need move the position of Evelyn more close to Kai. In addition, when I panning back to Kai and Polly, I want focus on both of them. But I have not completed this goal. As Robin said there are few ways to achieve it. For instance, I can zoom out when I doing the pan. But it is not a good way, because it looks like a little weird. Moreover, maybe Kai can take a step back. Then I change the aperture to big numbers, so I can get a great depth of field.

The cutting version:

In this version, I made some changes in shot choice. For example, in the first scene, I change the fist shot to a tracking shot. So we can see Kai knocking the door, then Polly walking in the frame. Also, I design the position of Evelyn again. Before Polly opens the door, she stands behind of Kai. So in the shot 1 and shot 2 we can’t see her. I think it will give curious feeling to viewers when Polly asks Kai who is that girl in shot 2. Then, in shot 3 and 4, Evelyn walks forward to give a hug to Polly, so their position naturally change to a triangle shape.

In the scene 2, I design one shot from the back of Kai and Polly. This shot is aim to show Evelyn’s face expression when she see the interaction between Kai and Polly. Also I use a panning in their talking conversation. When Polly say that she want to go outside, I pan to Kai’s face wanting for his reaction, then I follow with Kai’s eye line slowly passing Polly and panning to Evelyn. This pan may more clearly show everyone’s reaction when they talking to each other. Their action line may clear too. Of courses, this scene is not perfect, but I really try some different shots to show the script. Those exercise help me understand there are lots of different way to construct your dialogue scene, as long as you know what effect you want, and what thing you want emphasize.