她害怕写作文英语可以表达为 "She is afraid to write an essay" 或 "She has a fear of writing essays"。例如：

1. I'm afraid to write an essay because I don't know where to start.

2. She has a fear of writing essays, so she always procrastinates.

建议她在写作文之前先进行一些头脑风暴或列出一些想法，以减轻恐惧感。