will and shall 的用法1

A part

we use l'll...(=l will) when we've just decided to do something .when we say l'll do something we announce our decision:

for example

Oh,l left door open .l'll go and shut it down.

what would you like to drink.

---

 

B part 

we often use l'll in these situations.

offering to do something

agreeing to do something

promising to do something