每个人都曾试图在平淡的学习、工作和生活中写一篇文章。写作是培养人的观察、联想、想象、思维和记忆的重要手段。大家想知道怎么样才能写一篇比较优质的范文吗？以下是小编为大家收集的优秀范文，欢迎大家分享阅读。
手机保证书400字 手机保证书500字左右篇一
为了维护学校正常的教育教学秩序，保证学生在校学习、生活的和谐与安全，养成良好的生活行为习惯，构建“绿色”校园文化，促进身心健康成长，我们同意学校决定：禁止学生带手机等移动通讯进校园。
特此保证如下：
1、我们一定严格遵守学校不携带手机、小灵通、mp3等移动通讯工具进入校园的规定。
2、协助学校宣传禁止学生在校园内使用手机等移动通讯工具的积极意义，促使自己在思想上与学校规定达成统一，在行动上自觉地不在校园里使用手机等移动通讯工具。
3、保证在校学生学习、生活的和谐和安全，减少外界的干扰。
4、严格遵守学校不携带手机、小灵通等移动通讯工具进入校园的规定。从即日起，如有违反，自愿接受学校相应的处理（处理方式是将手机当面砸毁）。
致此
敬礼！
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这是一次十分深刻的保证书，我对于我这次犯的错误感到很惭愧，我不应该违背老师的话，我不该上课玩手机，带手机到学校来。恳请老师可以原谅我的错误，我这次的悔过真的很深刻。
不过，人总是会犯错误的，当然我知道也不能以此作为借口，我们还是要尽量的避免这样的错误发生，希望老师可以相信我的悔过之心。我的不良行为不是向老师的纪律进行挑战。绝对是失误，老师说的话很正确，就是想要犯错误也不应该再您的面前犯错误，我感到真的是很惭愧。
我真的已经很深刻的认识到了我的错误，知道了老师说的话不能够装做没有听见，老师说的话就要听从，老师说过话也绝对会实现她的诺言，老师所要管的一定是为了我们学生好，在此，我保证！今后绝不再犯类似错误，如有再犯，严惩不待！！
致此
敬礼！
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手机保证书400字 手机保证书500字左右篇六
xxx：
虽然现在一部手机的价格不是很高，但现在我走了心里扭曲，事后我才懂得我以前走的每一步路都是错误的。从现在开始我要从新做人找到做人的真谛，明确自己的人生目标，锻炼自己的意志，磨练自己坚定的决心。我不能在让不良的诱惑发生在我的身上，也不能发生在我身边的人身上，我在诱惑方面的抵抗能力很差，从现在开始我要不断增强抵抗能力，学会拒绝不良毛病。
今后的我要做一个更好的自己，要有自己的主意，有自己的认识，对与错误要慎重做出思考过后，才能做出正确的判断，这样才不会走上犯罪。
从现在开始我要好好学习，不能辜负、爸爸、妈妈、和王叔叔对我的众望，我要为我以前犯下的罪买单，从新找回自己的心信。为自己、爸爸、妈妈、王叔叔挣口气，为自己的未来去努力去加油。
我保证以后不会在出现犯罪违法的事，并与违法犯罪的事做斗争。
我保证从今天起以后不在到网吧和游戏厅去玩那些虚拟无聊的游戏。
请王叔叔相信我，我会好好学习的。我会各将个科成绩考个前几名的，请爸爸妈妈和王叔叔监督我吧！
保证人：张三
20xx.9.1
