전화통화를

In a sentence

• 저는 친구와 전화통화를 했어요.

  I had a phone conversation with a friend.

  In this sentence, '전화통화를' refers to the act of having a phone conversation and is used as part of the verb phrase indicating past action with a friend.

• 전화통화를 하면서 중요한 정보를 들었습니다.

  While having the phone conversation, I received important information.

  Here, '전화통화를' denotes the activity of having a phone conversation as a context or state during which another action occurred.

• 전화통화를 끝낸 후에 다시 생각해보세요.

  After finishing the phone conversation, think about it again.

  In this case, '전화통화를' is the object of the action '끝내다,' emphasizing the action of completing the phone call.