～てもらうTo get someone to do, To have someone do

The grammar point てあげる is used when you are doing something for someone else, indicating that you're providing a favor or help. On the other hand, てもらう is used when you are the recipient of the action, indicating that someone is doing something for you or you're asking someone to do something for you. Simply put, てあげる emphasizes the action you are doing for others, while てもらう emphasizes the help or action you are receiving from others.

The difference between もらう and てもらう largely rests on who is receiving the action. もらう is used when the speaker is receiving an object or service from someone else, like receiving a gift. On the other hand, てもらう is used when the speaker is on the receiving end of an action performed by another person, like having someone do a favor for you. So, in essence, もらう focuses on what you receive, while てもらう emphasizes the action performed for your benefit.

While both てくれる and てもらう are expressions that concern doing something for someone, they are used in different contexts and with different points of focus. てくれる is usually used when someone does something for you or for your benefit, expressing gratitude towards the action. On the other hand, てもらう often implies that you are getting or having someone to do something, focusing on the favor or the service that is being received or requested, with a stronger emphasis on your own benefit or desire.

The Japanese grammar point てもらう is used when you are asking someone to do something for you, suggesting a sense of favor and indirectly hinting at someone’s assistance in achieving your goal. On the other hand, ていただけませんか is more of a polite request, often used in formal situations. It involves asking someone to do something with an elevated level of politeness and respect towards the listener, indicating a higher emphasis on social etiquette.