写一封英文保证书保证以后不会逃课...就这样..要英文,不用太复杂.大概250~300字左右.

Guarantee
Respect for teachers,I wrote to you with a sense of guilt that I skipped classes yesterday.I didn't listen and remember well the attention of school notebooks.So I wrote to you to ask for your forgiveness.I promise that such kind of thing won't be happen again.I really realize my own mistake.Please trust me and give me a chance.I will study hard from now on.Just see my actions.
同学 改正错误还是要虚心滴 逃课可不好呀~