"Please help me buy a bag of sugar."

Translation: 请帮我买一袋糖。

[ushwald]

So when do we use 包 or 袋 as the word for "bag"?

[thismomentisall]

https://forum.duolingo.com/comment/27266609/%E5%8C%85-versus-%E8%A2%8B%E3%80%82When-to-use-which

[AliceAnlin]

谢谢！So loosely since you would not have sugar in a bag made out of fabric/leather, 包，instead you would use some kind of disposable plastic bag, 袋 ？

[NathanRasm]

Usually, 袋 is an open container like a sack, and 包 is a closed container like a packet. But that does make this sentence weird, because ... I usually buy my sugar in closed containers, not by the sackful.

[Peter_Catterall]

When to use 帮助 and when to shorten to just 帮 ?

[kalexchu]

Amongst the two, 帮 cannot be used as a noun (help, aid), but 帮助 can.

Personally, I tend to use 帮 for "to help" (verb) the most, and 帮助 in more formal contexts where you would maybe used "to aid" (verb) in English. Of course, there are more nuances than this.

[hengsha]

Why is 一个 not used here？

[Gabrielle145359]

Because 袋 is already the measure word.

[joe535059]

Yy