[michiru]

mustとhave toは、同じような意味合いで使用されると思いますが、ニュアンス的な違いや文法的な違いによる使い分けは必要でしょうか？それとも、どのような状況でも、好きなほうを使用できるのでしょうか？

[Errie]

Hello Michiru,

They both have the same meaning and therefore can be used interchangeably

MUST is often used as an instruction

For example
You MUST take off your shoes

He told us that we HAVE TO take off our shoes
but they can be used interchangeably….

Hope this helps