The grammar structure ~てから is used to express that one action happens after another action. It emphasizes the sequence and ensures that the first action is fully completed before the second action begins. It can also imply a starting point for a continuous or repeated activity.
Sequential Actions: Indicates that the second action takes place after the completion of the first.
Starting Point: Expresses that something has been happening since a specific action or event.
Setting a Precondition: Indicates that the second action cannot happen without the first being completed.
~て: Indicates sequence but doesn’t strongly emphasize completion.
~てから: Highlights that one action is completed first.