初中英语中描述动作和神态的简单句子如下：

1. She stood up, answered so accurately, so naturally, so smoothly, as if she had been ready.

2. I read books greedily, like a hungry lamb breaking into the green grass.

3. He did not feel sad, but I don't know what it is, but he suddenly understood: he was numb now! He chews the dish in his mouth, but thinks it seems to be made of mud, but it should be made of mud, and it should be a bit of mud.

4. The surface of the calm lake stirred the waves, and my mood was as cheerful as a wave.

这些句子都使用了简单句式，并且直接描述了人物的动作和神态，易于理解和学习。