책에 In the past, many upgrades involved people switching from a basic cell phone to a smartphone. 이런 문장이 있는데 switch가 왜 switching 형태로 쓰인거양..?ㅠㅠㅠㅠ
영잘알 영어 잘하는 판녀들아ㅠㅠ 졸라급함ㅅㅂ
책에
In the past, many upgrades involved people switching from a basic cell phone to a smartphone.
이런 문장이 있는데 switch가 왜 switching 형태로 쓰인거양..?ㅠㅠㅠㅠ