"帮" （vt）"请帮我开门！qing bang wo kai men!" Help me to open the door, please! "帮助"(v) "帮助别人是我的乐意bangzhu bie ren shi wo de leyi" Helping others is my pleasure （n）"谢谢你的帮助xiexie ni de bangzhu" Thank you for your help (formal) "帮忙"（n）"谢谢你的帮忙xiexie ni de bangmang" Thank you for your help (informal) （verb phrase）"只有他可以帮你的忙zhi you ta keyi bang ni de mang" Only he can help you The difference between "帮" and "帮助" : "帮" one syllable "帮助" two syllable sometime Chinese care about the symmetric in a phrase or in a sentence so you can use "帮" for the object with one syllable (帮我好不好？) Can you help me? and "帮助" for the object with two syllable (互相帮助) Helping mutualy The differences between "帮助" and "帮忙"： When it is a noun, "帮助" use for normal situation, "帮忙" use for innormal situation and another difference is "帮助" is a verb: 帮助 + obj, and "帮忙" is a verb phrase: 帮 + obj + 忙

"bang bang mang" is oral language , ang bang zhu is written languge.

帮 、帮助can be vt .帮、帮助means help sb to do something. but 帮忙 is a n. 帮忙 means somebody's help.EX: I need your help.我需要你的帮忙。