Let me get the door for you.
我来帮你开门吧。
Allow me.
请让我来
Can l get you something to drink?
我可以替你拿杯饮料吗?
Do you need a hand?
需要帮忙吗?
Can l help you?
需要帮忙吗?
I could use some help.
我需要帮手。
I need some help.
我需要帮手。
Don't worry about it.
不用客气。
No problem at all.
没有问题。