to change places (with); to be replaced (with, by); to be changed
to change (seats, shifts, etc.; with someone); to switch; to exchange
主役が途中で入れ替わった。
The lead was replaced partway through.
メンバーが次々と入れ替わっている。
The members are being replaced one after another.
季節が入れ替わる頃は風邪をひきやすい。
It's easy to catch a cold when the seasons change.