Asking for helpCan you give me a hand? Can you help me?
Giving adviceYou should do it right away. You had better arrive on time.
Making suggestionsWe could go for a coffee. Let’s start!
InvitingWhy don’t you come over tonight? Would you like to join us?
AgreeingThat’s a good idea! Of course!
DisagreeingI don’t think so. I’m afraid I disagree. 
ApologizingI’m sorry, I can’t make it tonight. I apologize.
GreetingGood morning/afternoon/evening

Exponents are language used to express a function. Different exponents can be used to express the same function.